james drops a 4-kg rock over the edge of a bridge. at one point the rock is moving with a speed of 8.5 m/s. what is the kinetic energy of the rock at this point?

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15-11-2022
Physics

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james drops a 4-kg rock over the edge of a bridge. at one point the rock is moving with a speed of 8.5 m/s. what is the kinetic energy of the rock at this point?

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kjuli1766 kjuli1766 · Answer 1 · 2022-11-18T19:23:14+01:00

The kinetic energy of the rock at this point is 144.5 J.

When a rock falls this potential energy changes. The movement of rocks is converted into kinetic energy. Imagine a rock on a cliff. Rocks have gravitational potential energy. To calculate kinetic energy: Find the square of the object's velocity. Multiply this square by the mass of the object. The product is the kinetic energy of the object.

Calculation:-

Given,

mass = 4 kg

velocity = 8.5 m/s

Kinetic energy = 1/2 mv²

= 1/2 × 4 ×(8.5)²

= 2× 8.5 ×8.5

= 144.5 J.

Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work that transfers energy is done on an object by applying a net force the object speeds up and thereby gains kinetic energy. Kinetic energy is the energy of motion, observable as the movement of an object, particle, or set of particles. All moving objects consume kinetic energy.

Learn more about Kinetic energy here:-https://brainly.com/question/25959744

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