Question

the rear side of truck is open and a box of mass 50 kg is placed at 3.2m away from the open end the coefficient of friction between the box and the surface is 0.2 if the truck starts from rest and moves on a straight road with acceleration 21.ms-² the box falls off a truck after a time (g=10ms-²)​

Answer 1

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Answer 2

Answer:

t = 8s

Explanation:

a=2.1−(0.2×10)=0.1

t=  $\sqrt{2S/a}$

a=0.1;s=3.2

t= $\sqrt{2(3.2)/0.1}$

t = $\sqrt{64}$

t = 8s

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