EASY
11th CBSE
IMPORTANT
Earn 100

 A person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing the seat belt, he falls forward and hits his head against the steering wheel. Why?

Important Questions on Laws of Motion

EASY
11th CBSE
IMPORTANT
 The velocity of a body of mass 2 kg as a function of t is given by v(t)=2ti^+t2j^. Find the momentum and the force acting on it, at time t=2 s
HARD
11th CBSE
IMPORTANT
 A block placed on a rough horizontal surface is pulled by a horizontal force F. Let f be the force applied by the rough surface on the block. Plot a graph of f versus F.
EASY
11th CBSE
IMPORTANT
Why are porcelain objects wrapped in paper or straw before packing for transportation?
EASY
11th CBSE
IMPORTANT
 Why does a child feel more pain when she/he falls down on a hard cement floor than when she/he falls on the soft muddy ground in the garden?
EASY
11th CBSE
IMPORTANT

A woman throws an object of mass 500 g with speed of 25 m s1.

What is the impulse imparted to the objects?

EASY
11th CBSE
IMPORTANT

A woman throws an object of mass 500 g with speed of 25 m s1.

If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object?

EASY
11th CBSE
IMPORTANT
 Why are mountain roads generally made winding upwards rather than going straight up?
EASY
11th CBSE
IMPORTANT

 A mass of 2 kg is suspended with thread AB (figure). Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually, harder and harder in the downward direction so as to apply force on AB. Which of the threads will break and why?

Question Image