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Nadya [2.5K]
3 years ago
7

At what height above the ground must a mass of 10 kg be to have a potential energy equal in value to the kinetic energy possesse

d by a mass of 10 kg moving with a velocity of 20 m/s? 100 m 10 m 50 m 20 m
Physics
1 answer:
Paladinen [302]3 years ago
5 0

Answer:

20 m

Explanation:

We'll begin by calculating the kinetic energy of the mass. This can be obtained as follow:

Mass (m) = 10 kg

Velocity (v) = 20 m/s

Kinetic energy (KE) =?

KE = ½mv²

KE = ½ × 10 × 20²

KE = 5 × 400

KE = 2000 J

Finally, we shall the height to which the mass must be located in order to have potential energy that is the same as the kinetic energy. This can be obtained as follow:

Mass (m) = 10 kg

Acceleration due to gravity (g) = 10 m/s²

Potential energy (PE) = Kinetic energy (KE) = 2000 J

Height (h) =..?

PE = mgh

2000 = 10 × 10 × h

2000 = 100 × h

Divide both side by 100

h = 2000 / 100

h = 20 m

Thus, the object must be located at a height of 20 m in order to have potential energy that is the same as the kinetic energy.

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Answer:

The magnitude of the car's acceleration as it slows during braking is 36.81 m/s²

Explanation:

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The magnitude of the net displacement is 95.3 m

Explanation:

To find the magnitude of the net displacement, we have to resolve each of the two displacements into the horizontal and vertical direction first.

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So its components are

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2nd displacement is:

d_2=16.7 m at 31.1^{\circ}

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