The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in figure. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 ms –2 . Find the distance (in m) travelled by the truck by the time box falls from the truck. (Ignore the size of the box).
Text Solution
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CHECK THE SOLUTION.
(20)
Sol. a block = 
= µg = 0.15 × 10 = 1.5
a T = 2
S T – S b = 5
a T t 2 – 
a B t 2 = 5
t 2 [2 – 1.5] = 5
t 2 = 20
S T = 
a T t 2
= 
× 2 × 20 = 20 m.
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