MEDIUM
9th Manipur Board
IMPORTANT
Earn 100

A horizontal force of 200 N is required to move a wooden cabinet across a floor at a constant velocity. Calculate the friction force exerted on the cabinet.

Important Questions on Force and Laws of Motion

MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 15
Two bodies having each of mass 2 kg are moving in the same straight line but in opposite directions. The velocity of each before collision is 3 ms-1. In the collision, they stick together. What will be the velocity of the combined body after collision?
MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 16
A sharp object of mass 0.5 kg travelling horizontally at a velocity of 100 ms-1 strikes a stationary wooden block of mass 2.5 kg. Therefore, the two move together in the same straight line. Calculate the total momentum before and after the impact. Also, calculate the velocity of the combined system.
MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 17
A ball of iron of mass 10 kg falls from a height of 0.8 m. If the downward acceleration of the ball is 10 ms-2, calculate the momentum transfer to the floor by the ball, provided the ball does not rebound.
EASY
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 18
An unbalanced force acts on a body. The body must
EASY
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 19
When a bus suddenly starts, the standing passengers lean backwards in the bus. It is an example of Newton’s
EASY
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 20
Action-reaction forces act
EASY
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 7 - Force and Laws of Motion>EXERCISES>Q 22
Suppose a constant force acts on a body initially kept at rest. The distance covered by the body in time t from start is proportional to