Question

5. A truck moving on horizontal road with contant
acceleration of 2m/s2. A block of mass 2 kg kept
inside truck. An observer also stands at rest in the
truck, then work done by pseudo force on block in
5 sec will be (There is no relative motion between
truck and block)
a
2Kg
(1) -50J
(2) +50J
(3) OJ
(4) +100J​

Answer 1

Answer:

3-

0 J

Explanation:

Here in non inertial frame it is been mentioned that there is no relative motion between truck and block. So the block is not moving anywhere. since

displacement is 0

so work done by pseudo force is 0

since here pseudo force wants to displace it but another force which is static friction is resisting the pseudo force, and as a result the forces cancel each other and block is not moved by anyone.