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Questions  

A box is placed on the floor of a truck moving with an acceleration of 7 ms–2. If the coefficient of kinetic friction between the box and surface of the truck is 0.5, find the acceleration of the box relative to the truck

a
1.7ms-2
b
2.1ms-2
c
3.5ms-2
d
4.5ms-2

detailed solution

Correct option is B

ab = aT - µg= 7 – 0.5 × 9.8ab = 7 – 4.9ab = 2.1 m/s2

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