Time left =
2
Newton’s second law of motion gives the measure of:
3
A person is standing in an elevator. In which situation he finds his weight less than actual when
4
Two blocks of masses 4 kg and 1 kg are in contact with each other on a frictionless table. When a horizontal force of 3.0 N is applied to the block of mass 4 kg, the value of the force of contact between the two blocks is
5
A machine gun shoots a 40 g bullet at a speed of 1200 m/s. The man operating the gun can exert and average force of 144 N at the most. How many bullets (maximum number) can be shot per sec?
6
A body of mass 50 kg is pulled by a rope of length 6 m on a frictionless surface by a fore of 106 N applied to the other end. The linear density of the rope is 0.5 kg/m. The force acting on 50 kg mass is
7
A scooter of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop of the scooter in 10 s is
8
A bullet fired from a gun. The force on the bullet is given by F = 600 – 2 × 105t where F is in newton and t in second. The force on the bullet becomes zero as soon as it leaves the barrel. The average impulse imparted to the bullet is