Answer:
a)
b)
Explanation:
Given:
Mass of the cabinet, m = 51 kg
a) Applied force = 200 N
Now the force required to move the from the state of rest (F) = coefficient of static friction ()× Normal reaction(N)
N = mg
where, g = acceleration due to gravity
⇒N = 51 kg × 9.8 m/s²
⇒N = 499.8 N
thus, 200N = × 499.8 N
⇒ =
b) Applied force = 100 N
since the cabinet is moving, thus the coefficient of kinetic() friction will come into action
Now the force required to move the from the state of rest (F) = coefficient of kinetic friction ()× Normal reaction(N)
N = mg
where, g = acceleration due to gravity
⇒N = 51 kg × 9.8 m/s²
⇒N = 499.8 N
thus, 100N = × 499.8 N
⇒ =