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3 years ago

What’s the velocity of an 11-kilogram object with 792 joules of kinetic energy?

Physics

2 answers:

lorasvet [3.4K]3 years ago

4 0

Answer: The velocity of the object is 12 m/s.

Explanation:

Mass of the object = 11 kg

Velocity of the object = v

Kinetic energy possessed by the object = 792 Joules

$K.E=\frac{1}{2}mv^2$

$792 Joules=\frac{1}{2}\times 11\times v^2$

$v=\sqrt{\frac{2\times 792 J}{11}}=12 m/s$

Hence, the velocity of the object is 12 m/s.

koban [17]3 years ago

3 0

12 m/s is the answer

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Armand hands the rock to Pierre, who is standing next to the trampoline. Explain how Armand moves, in terms of the forces acting

Nikolay [14]

Answer:

Armando's weight ,restored force created by the trampoline

a harmonic movement within the trampoline

Explanation:

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Amando's weight is vertical and directed towards the center of the Earth and has a constant value, this weight is balanced with the elastic force the springboard exerts on Armando in a vertical direction.

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In Summary Armando is in a harmonic movement within the trampoline

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3 years ago

Think about a car design. How would you improve efficiency? What new features would your car be able to do? Write at least 5 dif

drek231 [11]

Answer:

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Explanation:

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3 years ago

Raindrops fall vertically at 7.5 m/s relative to the Earth. What does an observer in a car moving at 20.2 m/s in a straight line

Vilka [71]

Answer:

vDP = 21.7454 m/s

θ = 200.3693°

Explanation:

Given

vDE = 7.5 m/s

vPE = 20.2 m/s

Required: vDP

Assume that

vDE to be in direction of - j

vPE to be in direction of i

According to relative motion concept the velocity vDP is given by

vDP = vDE - vPE (I)

Substitute in (I) to get that

vDP = - 7.5 j - 20.2 i

The magnitude of vDP is given by

vDP = √((- 7.5)²+(- 20.2)²) m/s = 21.7454 m/s

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θ is in 3rd quadrant so add 180°

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3 years ago

Explain why free fall acceleration near earths surface is constant

Naya [18.7K]

Because gravity is constant
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3 years ago

A coin released at rest from the top of a tower hits the ground after falling 5.7 s. What is the speed of the coin as it hits th

Bad White [126]

Given parameters:

Initial velocity of Coin = 0m/s

Time taken before coin hits ground = 5.7s

Unknown:

Final velocity of the coin = ?

Velocity is displacement with time. To solve this problem, we have to apply one of the equations of motion.

The fitting one of them here is shown below;

V = U + gt

where;

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity

t is the time taken

Here we use positive value of acceleration due to gravity because the coin is falling with the effect of acceleration and not against it.

Now input the parameters and solve;

V = 0 + 9.81 x 5.7

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3 years ago