Question

block of mass 2 kg rests on a rough horizontal plank, the coefficient of friction between the plank

and block is 0.3. If the plank is pulled horizontally with a constant acceleration of 4 m/s2

, the distance

moved by the block on the plank in 5 second starting from rest (in m) is:

(take g = 10 m/s2

)

a) 5 b) 10 c) 25 d) 50​

Answer 1

Explanation:

Using 2nd Equation of Motion,

$s = ut + \frac{1}{2} \times a {t}^{2}$

$= \frac{1}{2} \times 4 \times {5}^{2}$

$= 2 \times 25 = 50 \: m$

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