A 2.0 kg block is pushed 1.0 m at a constant velocity up a vertical wall by a constant force
applied at an angle of 27.0
◦ with the horizontal, as shown in the figure.
The acceleration of gravity is 9.81 m/s
If the coefficient of kinetic friction between
the block and the wall is 0.30, find
a) the work done by the force on the block.

b) the work done by gravity on the block.

c) the magnitude of the normal force between
the block and the wall.
.

Answer:

Explanation:

An impulse results in a change of momentum

FΔt = mΔV

m = FΔt / ΔV

m = F(t₁ - t₀) / (v₁ - v₀)

If the initial flight direction is the positive direction

m = -19.0(1.20 - 0.00) / (-7.00 - 5.00)

m = 1.9 kg

The percent of this energy that will be used up if he climbs 100-meter stairs is 1 %.

Potential energy = mgh

where

m = mass

g = acceleration due to gravity

h = height = 100 m

Therefore,  

weight = mg = 418.6 N

Potential energy = 418.6 × 100 = 41860 joules

covert 100 calories to joules.

1 calories = 4.184  j

100 calories = 418.4 joules

% energy used up = 418.4 / 41860 × 100

% energy used up = 41840 / 41860 = 0.99952221691

% energy used up ≈ 1 %

read more: https://brainly.com/question/14924538?referrer=searchResults

Answer:

1. What is the force of friction between a block of ice that

weighs 930 N and the ground if m = .12?

F fr £ µ sF N

F fr = µ kF N

F = ma

F N = 930 N

µ s = .12

F fr =µ kF N = (930)(.12) = 111.6 N = 110 N

(Table of contents)

2. What is the coefficient of static friction if it takes 34 N of

force to move a box that weighs 67 N?

F N = 67 N

µ s = ?

F fr =34 N

F fr = µ kF N

34 = µ k(67)

µ s = .507 = .51

(Table of contents)

3. A box takes 350 N to start moving when the coefficient of

static friction is .35. What is the weight of the box?

F N = ?????

µ s = .35

F fr =350 N

F fr = µ kF N

350 = (.35)F N

F N = 1000 N = 1.0 x 10 3 N

(Table of contents)

4. A car has a mass of 1020 Kg and has a coefficient of

friction between the ground and its tires of .85. What force of

friction can it exert on the ground? What is the maximum

acceleration of this car? In what minimum distance could it

stop from 27 m/s?

First find the normal force which is the weight in this

case:

F = ma = (1020 kg)(9.80 m/s/s) = 9996 N = F N

Then use the Friction formula to find the frictional

force with the ground:

F fr = = (.85)(9996 N) = 8496.6 N = 8500 N

Now we can find the acceleration. The Force of

friction is what speeds up the car, so

F = ma

8496.6 N = (1020 kg)(a)

a = 8.33 m/s/s = 8.3 m/s/s

So now we need to solve a cute linear kinematics

problem:

x = ?????

v i = 27

v f = 0

a = -8.33 m/s/s (slowing down)

t = don't care

Use vf 2 = vi 2 + 2ax:

0 2 = (27) 2 + 2(-8.33 m/s/s)s

x = 43.76 m = 44 m

(Table of contents)

5. Clarice moves a 800. gram set of weights by applying a

force of 1.2 N. What is the coefficient of friction?

m = 800. g = .800 kg (divide by 1000)

First find the normal force which is the weight in this

case:

F = ma = (.800 kg)(9.80 m/s/s) = 7.84 N = F N

Next - apply the force of friction formula:

F fr = µ kF N

1.2 N = µk (7.84 N)

µ k = .15306 = .15

(Table of contents)

Explanation:

Note that is not an answer that is guide

thanks po

hope it help ❤️

it's because the cannon pushing the bullet to fire

Answer:

Analog signals are susceptible to noise

jawaban: what is languange?

Did anyone get an answer for this??

I. The resistance which is needed to generate a current of 0.25 Ampere in the ceiling fan is 480 Ohms.

II. Since current is inversely proportional to the resistance in the electrical circuit, an increase in the current (larger currents) flowing into the electrical circuit of the ceiling fan would cause the resistance to decrease in magnitude at medium and high speeds.

Given the following data:

To calculate the resistance needed to generate that current, we would apply Ohm's law:

Ohm's law states that at constant temperature, the current flowing through an electrical circuit is directly proportional to the voltage (potential difference) applied across the two terminals of the electrical circuit and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

[tex]V=IR[/tex]

Where;

Making R the subject of formula, we have:

[tex]R =\frac{V}{I}[/tex]

Substituting the given parameters into the formula, we have;

[tex]R=\frac{120}{0.25}[/tex]

Resistance, R = 480 Ohms

Since current is inversely proportional to the resistance in the electrical circuit, an increase in the current (larger currents) flowing into the electrical circuit of the ceiling fan would cause the resistance to decrease in magnitude at medium and high speeds.

In conclusion, the larger the current, the lower the resistance would be at both medium and high speeds.

Read more on resistance here: https://brainly.com/question/23754122

Answer:

Participate in beach cleanups to reduce water pollution.

Explanation:

Answer:

I had to put the blocks on the weigher, and write down how much they weigh. I had to put the blocks next to the ruler to measure the height.

Explanation:

u would change wright to write because wright can be a name and if u change it to write that would be correct because u are actually writing something down. so it would be right because u are writing something down

Answer:

A large forest has more toes than the smaller forest

Explanation:

If the dog barks twice, but the cat doesn't, then it states that I caw can ring 5 times.

Answer:

For two polarizing filters to block out all light passing through them, one filter should be rotated 90 degrees from the other.

hope this helps!

Explanation:

Answer: A

Explanation:

honestly, it sounded the best

Answer:

The average speed of the given object.. is 2m/^s

Answer:

I believe Beta Radiation based upon my research

Explanation:

Answer:

n

Explanation:

klljl

Answer:

Explanation:

2okg

Answer:

Explanation:

v² = u² + 2as

v² = 17² + 2(-9.8)(-51)

v² = 1,288.6

v = ±35.89707...

v = 36 m/s

Answer:

halo

Explanation:

good bye

Answer:

f = c / y          where y is the wavelength lambda

y = 3.00E8 / 5.17E14/s = 5.80E-7 m = 580 millimicrons - visible yellow

To calculate the wavelength of the radiation, you can use the formula that relates the speed of light (c) to the frequency (f) and wavelength (λ) of electromagnetic waves: λ = c / f.

Where:

λ = Wavelength

c = Speed of light (approximately 3.00 x 10^8 m/s)

f = Frequency

Given that the frequency (f) is 5.17 x 10^14 s^-1, you can plug in the values and calculate the wavelength:

λ = (3.00 x 10^8 m/s) / (5.17 x 10^14 s^-1)

λ ≈ 5.80 x 10^-7 meters

So, the wavelength of the radiation is approximately 5.80 x 10^-7 meters, which is in the range of the visible light spectrum (typically measured in nanometers).

To know more about wavelength:

https://brainly.com/question/31143857

#SPJ3

Answer:

[tex]\boxed {\boxed {\sf 4.5 \ m/s \ in \ the \ positive \ direction}}[/tex]

Explanation:

We are asked to find the final velocity of the boat.

We are given the initial velocity, acceleration, and time. Therefore, we will use the following kinematic equation.

[tex]v_f= v_i + at[/tex]

The initial velocity is 2.7 meters per second. The acceleration is 0.15 meters per second squared. The time is 12 seconds.

Substitute the values into the formula.

[tex]v_f = 2.7 \ m/s + (0.15 \ m/s^2)(12 \ s)[/tex]

Multiply the numbers in parentheses.

[tex]v_f= 2.7 \ m/s + (0.15 \ m/s/s * 12 \ s)[/tex]

[tex]v_f = 2.7 \ m/s + (0.15 \ m/s *12)[/tex]

[tex]\v_f=2.7 \ m/s + (1.8 \ m/s)[/tex][tex]v_f=2.7 \ m/s + (1.8 \ m/s)[/tex]

Add.

[tex]v_f=4.5 \ m/s[/tex]

The final velocity of the boat is 4.5 meters per second in the positive direction.

Answer:

i dont know

Explanation:

but i know that someone knows

Answer:

There is pressure on both the in and outsides of the balloon: high inside and low outside, respectively. In terms of air mass, high pressure has greater activity and tends to move upward (balloon rises); whereas low presssure, being slower, descends (balloon descends).

Explanation:

Hi there!

The Amplitude is the 'A' value of the following SHM equation:

[tex]x(t) = Asin(\omega t)[/tex]

Thus, the amplitude of this object:

A = 0.50 m

The period of vibration is equivalent to:

[tex]T = \frac{2\pi}{\omega}[/tex]

In this instance:

[tex]\omega = \frac{\pi}{2}[/tex]

Therefore:

[tex]T = \frac{2\pi}{\frac{\pi}{2}} = \frac{4\pi}{\pi} = \boxed{\text{ 4 seconds.}}[/tex]

Answer:

Explanation:

don't know about any of the individual forces but the NET FORCE is zero.

If there were a net force, then acceleration would occur and velocity would not be constant.

Answer: Part A its C

Part B is B

Explanation:

Answer:

even more space than it already encompassed.

Explanation:

it is expanding into nothingness or it might it expanding in and of itself

A straight piece of wire with a current I flowing through it is placed in a magnetic field

A straight piece of wire with a current I flowing through it is placed in a magnetic fielduniform and perpendicular to the magnetic field lines. Magnetic force acting on the string

A straight piece of wire with a current I flowing through it is placed in a magnetic fielduniform and perpendicular to the magnetic field lines. Magnetic force acting on the stringthere is a way

Answer:

See below:

Explanation:

Hello! I hope you are having a nice day!

There are many forms of energy transformation, the main being:

+ GPE (Gravitational Potential Energy)

+ Chemical Energy

+ Electrical Energy

+ Radiant Energy

+ Kinetic Energy.

+ Mechanical Energy

For this case, the gasoline has to power a motor in most cases to turn the wheels of the automobile, the gasoline is burnt to create energy to power the motor(s).

In this case, the motor is moved due to Mechanical Energy.

(Keep in mind that Gasoline isn't energy, although it's used to create energy.)

Cheers!

Answer:

20j

Explanation:

espero haverte

ayudado