3 years ago

A 40 kg rock is rolling toward a town at 4 m/s after an earthquake. Calculate the KE.

Physics

1 answer:

adelina 88 [10]3 years ago

4 0

Answer:

320 J

Explanation:

From the question,

KE = 1/2mv².................. Equation 1

Where KE = Kinetic Energy, m = mass of the rock, v = velocity of the rock

Given: m = 40 kg, v = 4m/s

Substitute these values into equation 1

KE = 1/2(40)(4²)

KE = 20×16

KE = 320 J

Hence the kinetic energy of the rock is 320 J

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