Question

observe the following figures of pulling a brick horizontally and vertically with a spring balance. note the spring balance readings in both cases and write your observations and conclusion.​

Answer 1

Answer:

It is observed that the reading of the spring balance in the case when brick is wrapped with a piece of poly thene is less than the other cases.

The reason for this difference could be that in the first case, since the brick surface in contact with the ground is rough, the surface gets greater force of friction. But in second case, when the brick is wrapped with polythene, the surface gets smoother. Hence, less frictional force is required to move it.

By wrapping a piece of jute bag around the brick, it is observed that the reading of spring balance is more than the second

case, when the brick was wrapped with polythene.