Question

Question 10 Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?

Class 9 - Science - Force and Laws of Motion Page 128

Answer 1

Hi !

Force applied ,   P = 200 N 
Force of Friction = F =  ?

As the wooden cabinet is to move across the floor with a constant velocity , no force (f) is spent in accelerating the cabinet , i.e , f = P - F = 0

or

F = P = 200 N

Answer 2

Answer:

HEY GUYS

Explanation:

Answer: Since, a horizontal force of 200N is used to move a wooden cabinet, thus a friction force of 200N will be exerted on the cabinet. Because according to third law of motion, an equal magnitude of force will be applied in the opposite direction.