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3 years ago

A mass of 2000 kg is raised 5 m in 10 seconds. What is the kinetic energy of the mass at that height?

Physics

1 answer:

madam [21]3 years ago

3 0

<h3><u>Answer;</u></h3>

98,000 joules

<h3><u>Explanation;</u></h3>

Kinetic is the energy possessed by a body in motion; while kinetic energy is the energy possessed by a body while at rest.

Potential energy is given by; mgh, where m is the mass, g the gravity, 9.8 m/s² and h is the height.

Energy can be transformed from one form to another and can neither be created or destroyed.

Therefore;

Potential energy = 2000 × 5 × 9.8

= 98,000 joules

Therefore, the kinetic energy will still be 98,000 joules, when the body is in motion.

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3 years ago

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Nataly_w [17]

Explanation:

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3 years ago

What can one say for sure about element #99, Einsteinium (Es))? a) There's no such element! b) It is an alkali metal. c) It is r

Dmitrij [34]

Answer:

Option (C)

Explanation:

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3 years ago

Two objects must be in contact for them to exert a force on each other. <br> True or False

nevsk [136]

Answer:

False

Explanation:

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3 years ago

1. When you have different masses for each sphere, how does the force that the larger mass sphere exerts on the smaller mass sph

aleksandrvk [35]

1) The forces are equal (Newton's third law of motion)

2) The force between the spheres will quadruple

3) The force of gravity exerted by the notebook on you is negligible

Explanation:

In this part of the problem, we want to compare the gravitational force exerted by the larger mass sphere on the smaller mass sphere to the force exerted by the smaller mass sphere to the larger mass sphere.

We can do this by using Newton's third law of motion, which states that:

<em>"When an object A exerts a force (called </em><em>action</em><em>) on an object B, then object B exerts an equal and opposite force (called </em><em>reaction</em><em>) on object A"</em>

In this problem, we can identify the larger mass sphere as object A and the smaller mass sphere as object B. This law tells us that the two forces are equal in magnitude and opposite in direction: therefore, the gravitational force exerted by the larger mass sphere on the smaller mass sphere is equal to the force exerted by the smaller mass sphere to the larger mass sphere.

The magnitude of the gravitational force between the two spheres is given by

$F=G\frac{m_1 m_2}{r^2}$