Question

A monkey of mass 10 kg is moving on a plank if 30 kg with an acceleration 1 m/s2 in rightward direction. more than 1 correct a)The horizontal force exerted by plank on monkey is 10N b)The acceleration of plank is 0.25m/s2 c)The acceleration of plank is 13m/s2 d)The acceleration of plank is zero

Answer 1

Answer:

(b)

(b) Maximum acceleration of 2 kg block due to friction can be

. <br> Combined acceleration, if both move together with same acceleration would be, <br>

<br> Since, both accelerations are equal, upper block will move with acceleration

due to friction. <br> In first two seconds,

<br> and force of friction, f=ma=10 N <br>