First slide

Work Energy Theorem

Question

A lorry and a car moving with same momentum are brought to rest by applying the same retarding force. Then

Easy

A

LORRY will come to rest in a shorter distance
B

car will come to rest in shorter distance
C

both come to rest in the same distance
D

none

Solution

$W = F \times S = K E = \frac{P^{2}}{2 m} g i v e n P = C O N S T A N T a n d F = C O N S T A N T S O S α \frac{1}{m} b e f o r e c o m i n g t o r e s t c a r w i l l t r a v e l m o r e d i s \tan c e a n d L O R R Y W I L L C O M E T O R E S T I N S H O R T E R D I S T A N C E .$

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