Question

A plank is supported on the steps of a staircase . How many forces are acting on it ??
A). 4
B). 5
C). 6
D). 7

Answer 1

Explanation:

Dear student,

The plank will experience weight, Normal reactions, frictional force.

the total number of forces will depend on the fact that we are considering the normal reactions at each step same or different and also that the plank is supported by how many steps.