Question

A car is moving with a uniform velocity of 54 kilometre per hour (km/h).What is the kinetic energy of a body of mass 40kg sitting in the car?​

Answer 1

Answer:

distance cover in one hour = 54 km / hr = 54 *5\18=15 m/s

mass= 40 kg

k. e = 1/2 m(v)^2

1/2* 40*15^2

= 20*225=4500 j

Answer 2

$\huge\mathfrak{Bonjour!!}$

$\huge\bold\green{Answer:-}$

⏩ Velocity of the boy, v= Velocity of car= 54km/h = 54 × 1000m/3600s = 15 m/s

Mass of the boy, m= 40 kg.

Therefore,

K.E. of the boy= 1/2 mv² = 1/2 × 40 ×

(15)²

= 4500 J. Ans.

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