A car of mass 1000kg is moving at a speed of 20m/s.
It's brought to rest at a distance of 50m. Calculate the net force acting on the car. ​

Answers

Answer 1

Answer:

-4000 N

Explanation:

1. First let's look at what we know.

Mass: 1000 kg

Initial velocity: 20 m/s

Final velocity: 0 m/s

Displacement: 50 m

2. Let's try and apply a Kinematics equation here.

Looking at what information we have, I would say that this is the best equation:

v[tex]f^{2}[/tex]=v[tex]o^{2}[/tex] + 2aΔx

3. Plug in the numbers.

0 = 400 + 2(a)(50)

0 = 400 + 100a

-400 = 100a

a = -4 m/s^2

4. Use ∑F=ma

∑F = (1000)(-4)

∑F = -4000 N


Related Questions

The part of a circult that increases the electric potential of the electrons is the

Answers

Answer:

The part of a circuit that increases the electric potential of the electrons is the battery.

Answer:

Explanation:it is an electromotive force that increases the potential of the electrons.

What is a good analogy for potential energy in a circuit?

Answers

Answer: find the answer in the explanation

Explanation: The potential energy in a circuit between two points is the workdone in taking units positive charge from one point to the other in the circuit. Its S.I unit is Joule.

Because voltage of a battery or cell in a circuit is the potential energy difference across its terminal

The potential energy difference between two points is one volt, if the workdone in taking one Coulomb of positive charge from one point to the other is one Joule.


What caused the mistake that led to the destruction of the Mar's rover?

Answers

Answer:

Metric Math Mistake Muffed Mars Meteorology Mission. 1999: A disaster investigation board reports that NASA's Mars Climate Orbiter burned up in the Martian atmosphere because engineers failed to convert units from English to metric

Explanation:

hope this helps =)

the skeletal system serves all the following functions except

Answers

Answer:

The major functions of the bones are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and hematopoiesis. Together, the muscular system and skeletal system are known as the musculoskeletal system.

your question seems incomplete. Kindly give the full question so that it helps :)

Answer:

D.

producing ligaments and tendons

Explanation:

Which one of the following is not equivalent to 2.50 miles?
(1.00 mi = 1.61 km = 5280 ft, 1.00 yd = 3.00 ft = 12.0 in.)
(A) 1.32 x 104 ft
(B) 1.58 x 105 in
(C) 4.02 x 103 km
(D) 4.40 x 103 yd
(E) 4.02 x 105 cm

Answers

Answer:

Choice C is not equivalent to 2.50 miles.

Explanation:

The given data is now converted into feet, inches, kilometers, yards and centimeters:

mi - ft

[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)[/tex]

[tex]x = 13200\,ft[/tex]

[tex]x = 1.320\times 10^{4}\,ft[/tex] (Choice A)

mi - in

[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)\cdot \left(12\,\frac{in}{ft} \right)[/tex]

[tex]x = 158400\,in[/tex]

[tex]x = 1.584\times 10^{5}[/tex] (Choice B)

mi - km

[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)[/tex]

[tex]x = 4.025\,km[/tex] (Different from Choice C)

mi - yd

[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi}\right) \cdot \left(\frac{1}{3}\,\frac{yd}{ft} \right)[/tex]

[tex]x = 4400\,yd[/tex]

[tex]x = 4.40\times 10^{3}\,yd[/tex] (Choice D)

mi - cm

[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)\cdot \left(100000\,\frac{cm}{km}\right)[/tex]

[tex]x = 402500\,cm[/tex]

[tex]x = 4.025\times 10^{5}\,cm[/tex] (Choice E)

Choice C is not equivalent to 2.50 miles.

What is the mass of a 600 gram object on the moon

Answers

The object’s mass will be 600 grams on the moon. If you meant it’s weight, it will be 1/6 that of on Earth while on the moon.
It is 1/6 times that on the moon.

Giotto used foreshortening in order to:
O A. enhance the importance of his subjects.
O B. make his figures look more realistic.
O C. combine linear and aerial perspectives.
O D. guide the eye of the viewer.
SUBMIT

Answers

Answer:

I think B is the answer.

A machine with a 5-N input force and a 25-N output force has a mechanical advantage of (I point)
02
05.
O20.
O125​

Answers

Answer:

020

Explanation:

On which of the following objects, all sitting on the ground together, does
Earth exert a greater gravitational pull than a pencil? Check all that apply.
A. A basketball
B. A toothpick
C. A truck
D. A piece of paper
E. Your hand​

Answers

Explanation:

a toothpick

A ball rolls with a speed of 4.0 m/s across a level table that is 1.0 m above the floor. Upon reaching the edge of the table, it
follows a parabolic path to the floor. How many meters along the floor is the landing spot from the table?

Answers

Answer: 1.81m

Explanation:

Given the following:

Horizontal speed = 4m/s

Height of table = 1m

Taking the vertical component of the motion:

Using:

S = ut + 0.5 at^2

Where, S = height of table, a = acceleration due to gravity (9.8m/s^2), t = time and u = Initial Velocity in vertical direction = 0

1 = 0(t) + 0.5(9.8)t^2

1 = 4.9t^2

t^2 = 1 / 4.9

t^2 = 0.204081

t = sqrt(0.204081)

t = 0.452s

For Horizontal :

Gravitational acceleration is absent, therefore distance can be calculated using:

Distance = Velocity × time

Distance = 4m/s × 0.452s

Distance = 1.808 m

Distance = 1.81m

The process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions is called __________.
A. empiricism
B. deductive reasoning
C. scientific method
D. inductive reasoning

Answers

Answer:

Deductive reasoning

Explanation:

deductive reasoning

the process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions about it

Force = 7kN
Pressure = 1mPa
Area = ?

Answers

Answer:

7 m^2

Explanation:

P=F/A

1=7/A

1A=7

A=7

Area is 7 meters squared

A blow dryer transfers thermal energy mainly by
A. conduction
B. convection
C. radiation
D. specific heat

Answers

Answer:

B

Explanation:

Through air

Answer:

thermal conduction I assume

Explanation:

why because the thermal Insulator: a material that conducts thermal energy poorly. Gives off heat

These waves are often used as a means to transfer digital information such as a text message or website.
A)Infrared
B)Ultraviolet
C)Radio
D)Visible Light

Answers

Answer:The answer is C

Explanation:

The waves are often used as a means to transfer digital information such as a text message or website is radio waves. The correct option is C.

What is digital information?

Digital information generally consists of data that is created or prepared for electronic systems and devices such as computers, screens, calculators, communication devices. These information are stored by cloud.

The wave used for the same purpose is radio waves which has the high frequency range.

Thus, the correct option is C.

Learn more about  digital information.

https://brainly.com/question/4507942

#SPJ5

Describe the relationship between frequency and wavelength

Answers

Answer:

Frequency and wavelength are inversely related.

Explanation:

Frequency and wavelength have an inverse relationship because if one thing goes up another goes down. For example, if frequency goes up, the wavelength goes down and vice versa.

Answer:

The relationship between wavelength and frequency is that the frequency of a wave multiplied by its wavelength gives the speed of the wave.

Explanation:

Frequency and wavelength are related terms also, used to describe electromagnetic radiation or light. One simple equation is used to convert between them: frequency x wavelength = speed of light. λ v = c, when λ is wavelength, v is frequency, and c is the speed of light.

I know I'm really late but I hope this helps lol

forms of energy!! matching game PLZ I NEED HELP !!!

Answers

6- a
3- d

I don’t know the other sorry

At which point is the potential energy the greatest? At which point is kinetic energy the greatest?

Answers

Answer:

Kinetic energy is greatest at the lowest point of a roller coaster and least at the highest point.

hope it helps you make me as brainlylist

Potential energy will be greatest at the points A and G, and kinetic energy will be greatest at the point D.  

• The energy possessed by an object due to its motion is termed as the kinetic energy. On the other hand, the energy stored within an object because of its position relative to some zero position is known as the potential energy of the object.  

• Kinetic energy is highest when the velocity is the highest, in the case of pendulum, this takes place at the bottom. In the given case, that is, at point D.  

• If kinetic energy is highest at point D, then at the same point potential energy will be the lowest.  

• Therefore, potential energy would be highest at its highest point on each of the side of its motion where it remains stationary for some time, that is, at point G and A.  

Thus, kinetic energy would be highest at point D, and potential energy would be highest at the points A and G.

To know more about:

https://brainly.com/question/20748548

100 POINTS! WILL MARK BRAINLIEST FOR CORRECT ANSWER!

Choose one object or instrument. Write a detailed explanation of what happens when a loud and quiet sound is made. Use the words vibration, energy, longitudinal wave, amplitude and particles in your answer.

Answers

Answer:

This extra energy causes the string to vibrate more, which helps it move more air particles for a longer time. A string plucked with force has greater amplitude, and greater amplitude makes the sound louder when it reaches your ear. Volume depends on amplitude. Greater amplitude produces louder sounds.

9. A ball is thrown straight up with an initial speed of 30 m/s. How long will it take to reach the top of its trajectory, and high will the ball go?​

Answers

Answer:

1.) Time t = 3.1 seconds

2.) Height h = 46 metres

Explanation:

given that the initial velocity U = 30 m/s

At the top of the trajectory, the final velocity V = 0

Using first equation of motion

V = U - gt

g is negative 9.81m/^2 as the object is going against the gravity.

Substitute all the parameters into the formula

0 = 30 - 9.81t

9.81t = 30

Make t the subject of formula

t = 30/9.81

t = 3.058 seconds

t = 3.1 seconds approximately

Therefore, it will take 3.1 seconds to reach to reach the top of its trajectory.

2.) The height it will go can be calculated by using second equation of motion

h = ut - 1/2gt^2

Substitutes U, g and t into the formula

h = 30(3.1) - 1/2 × 9.8 × 3.1^2

h = 93 - 47.089

h = 45.911 m

It will go 46 metres approximately high.

why does a bouncing ball have a greater change in momentum than a ball that is just caught

Answers

If the ball bounces, then there is an additional velocity change sending the ball back upwards opposite the original direction. Thus, for the same collision time, bouncing involves a greater velocity change, a greater momentum change, and therefore a greater impulse.

Answer:

because with the change in momentum the velocity goes to zero. (more info below)

Explanation:

Momentum is the velocity change multiplied by the mass. When you think about it, bouncing an object means it comes back from anything it bounced against, giving it a velocity that is negative. This means that the velocity change for bouncing is greater than for colliding, as the velocity goes to zero in an inelastic collision like the one described.

hope this helped!

Which graph shows the correct relationship between kinetic energy and speed?

Answers

Answer: D

Explanation:

Kinetic energy = 1/2mV^2

From the formula above, we can deduce that kinetic energy is proportional to the square of speed. That is,

K.E = V^2

Graphically, the relationship isn't linear but a positive exponential. Therefore, option D is the correct answer.

Answer:

The correct answer is D.

Explanation:

Hope this helps.

A squirrel jumps down from a tall tree. Assuming the squirrel is in free fall,
how far will it have fallen in 1.3 seconds?
O A. 6.4 m
B. 13.2 m
O C. 8.3 m
O D. 11.1 m

Answers

Use the formula:
d=.5 x g x t^2

G=9.8 meters per second
t=1.3 seconds

d=0.5×9.8×1.3^2

Answer is C. 8.3 m

Answer:

8.3 m

Explanation:

If you see ##### in a cell, you should
make the row taller
retype the number
type in a different number
make the column wider

Answers

Answer:

it's D. Make the column wider

Explanation:

I am literally so confused on what the question is asking halp :(

Answers

Answer: B

Explanation: Distance/Time but if u want it easier its Velocity=Distance/Time or (Final Velocity -Starting Velocity)/Time

a bicycle coasts along a flat road. what form of energy does it best demonstrate ​

Answers

Answer:

Kinetic energy

hope this helps:))

A mover uses a ramp to load a crate of nails onto a truck. The crate, which must be lifted 1.5 m from the street to the bed of the truck, is pushed along the length of the ramp. If the ramp is 4.5 m long and friction between the ramp and crate can be ignored, what is the mechanical advantage of the ramp?

Answers

Answer: M.A = 3

Explanation:

A ramp is an example of an inclined plain. Where the

Height H = 1.5 m

Length L = 4.5 m

Mechanical advantage of a machine is the ratio of the load to effort. While mechanical advantage M.A of an inclined plain is the ratio of the length of the plain to the height of the plain.

M.A = L/H

Substitute the values of L and H into the formula

M.A = 4.5/1.5 = 3

The mechanical advantage of the ramp is 3

How do you inhibitors work

Answers

Answer:

By binding to enzymes' active sites, inhibitors reduce the compatibility of substrate and enzyme and this leads to the inhibition of Enzyme-Substrate complexes' formation, preventing the catalyzation of reactions and decreasing (at times to zero) the amount of product produced by a reaction.

Explanation:

what is the equivalet tempreture of 0 kelvin in celcius scale
HELP NEED IT IN 5 MIN

Answers

Answer:

-273.15 degree celcius

Explanation:

how much work must be done by frictional forces in slowing a 1000-kg car from 26.1 m/s to rest?

Answers

Answer:

Explanation:

Work done by the frictional force is 3.41x10^5 J

It is given that,

Mass of the car, m = 1000 kg

Initial velocity of car, u = 26.1 m/s

Finally, it comes to rest, v = 0

We have to find the work done by the frictional forces. Work done is equal to the change in kinetic energy as per work - energy theorem i.e.

W = −340605 J

or Hence, the correct option is (a).

Hannah knows she has some natural skill at field hockey, but she never practices in the off season. This is an example of

Answers

Answer:

wasting talent

Explanation:

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