EASY
Earn 100

Explain why pull is easier than push.

Important Questions on Laws of Motion

MEDIUM
A balloon with mass m is descending down with an acceleration a (where a<g). How much mass should be removed from it so that it starts moving up with an acceleration a?
HARD
A rope of length L and uniform linear density is hanging from the ceiling. A transverse wave pulse, generated close to the free end of the rope, travels upwards through the rope. Select the correct option.
EASY
A body of weight W1 is suspended from the ceiling of a room through a chain of weight W2. The ceiling pulls the chain by a force
MEDIUM
Two blocks A and B of masses 3m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively
Question Image
EASY
Explain why the frictional force is said to be a contact force.
EASY
Identify the force that comes into play in the following case:
Riding a cycle on a straight road and then negotiating a turn.
EASY
An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms.
muscular, contact, non-contact, gravity, friction, shape, attraction 

The type of force responsible for a change in the state of motion of the arrow is an example of a _____ force.

EASY

Write the quadrants in which the following points lie:

-4,7

MEDIUM
List any two advantages and two disadvantages of friction.
MEDIUM
Assertion: A lighter and a heavier bodies moving with same moment and experiencing same retarding force have equal stopping times.

Reason: For a given force and momentum, stopping time is independent of mass.
EASY
Which contact force always opposes a motion? Give examples.
EASY
Which of the following is an example of contact force?
MEDIUM
Why do you slip while walking on snow or on stepping on a banana peel?
MEDIUM
Name the type of force acting on a moving object.
EASY
Friction is caused by the _________ on the two surfaces in contact.
MEDIUM
When we stop pedalling a bicycle, it comes to rest after some time. Describe the forces responsible for the change in the state of motion of the bicycle.
EASY

Name the type of forces involved in a moving boat coming to rest when rowing is stopped.