Question 3 :
Which of the following has more inertia, a five rupes coin or a one rupee coin?
Question 4 :
According to the third law of motion, action and reaction ___
Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d2e3f59b460d7261f64e.jpg' />
The above image is the distance-time table of an object in motion. What do you infer about the forces acting on the object?
Question 6 :
A bullet of mass 10 g travelling horizontally with a velocity of 150 m/s strikes a stationary wooden block and comes to rest in 0.03 s. What is the magnitude of the force exerted by the wooden block on the bullet?
Question 7 :
An object of mass 2 kg is sliding with a constant velocity of $4ms^{-1}$ on a frictionless horizontal table. The force required to keep the object moving with the same velocity is
Question 8 :
A water tanker filled up to $\frac{2}{3}$ of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would ______.
Question 9 :
Water sprinkler used for grass lawns begins to rotate as soon as the water is supplied. Explain the principle on which it works.
Question 10 :
A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goal keeper to
Question 11 :
Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. Will they move with the same speed?
Question 12 :
There are three solids made up of aluminium, steel and wood, of the same shape and same volume. Which of them would have highest inertia?
Question 13 :
What is the momentum of an object of mass m, moving with a uniform velocity v?
Question 14 :
Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?
Question 15 :
Which of the following has more inertia, a rubber ball or a stone of the same size?
Question 16 :
Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more?
Question 17 :
A horse continues to apply a force in order to move a cart with a constant speed because the force applied by the horse balances the force of friction.
Question 18 :
A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is
Question 19 :
Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?
Question 20 :
A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because