Question

Define kinetic energy. Obtain an expression for the kinetic energy of an object.



(b) a ball of mass 400 g rolls on a ground with a uniform speed of 25 m s'1. Find the kinetic energy possessed by it.



answer:

Answer 1

A.

Kinetic energy means the energy possessed due to its motion

K.E = 1/2 mv2

B.

K.E = 1/2 × 0.4 × 625

K.E = 1/2 × 250

K.E = 125 J

Answer 2

The energy possessed by an object by virtue of its motion is called kinetic energy.

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And b) answer is in the photo