Two cars, and , are moving on a level road. Car : mass , speed Car : mass , speed (i)…

PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy

Problem

Two cars,

A

and

B

, are moving on a level road. Car

A

: mass

800\,\text{kg}

, speed

54\,\text{km/h}

Car

B

: mass

1000\,\text{kg}

, speed

45\,\text{km/h}

(i) Convert the given speeds into

\text{m/s}

. (ii) Calculate the kinetic energy of each car. (iii) Which car possesses more kinetic energy and by how much? (iv) If the speed of car

A

is increased by

10\,\text{km/h}

while its mass remains the same, will it then have more kinetic energy than car

B

? Support your answer with calculation.