Test Preparation on Newton's Law of Motion-II-Physics Test Series For NEET 2020

An explosion blows a rock into three parts. Two parts go off
at right angles to each other. These two are, 1 kg first part
moving with a velocity of 12 ms ^-1 and 2 kg second part
moving with a velocity of 8 . ms ^-1 If the third part flies off
with a velocity of 4 , ms ^-1 its mass would be

A shell at rest at the origin explodes into three fragments of
masses 1kg, 2kg and m kg. The 1kg and 2kg pieces fly off
with speeds of 5ms–1 along x-axis and 6ms–1 along y-axis
respectively. If the m kg piece flies off with a speed of 6.5ms–1,
the total mass of the shell must be

The rate of mass of the gas emitted from rear of a rocket is
initially 0.1 kg/sec. If the speed of the gas relative to the
rocket is 50 m/sec and mass of the rocket is 2 kg, then the
acceleration of the rocket in m/sec2 is

A shell of mass 10 kg is moving with a velocity of 1 10 ms-
when it blasts and forms two parts of mass 9 kg and 1 kg
respectively. If the 1st mass is stationary, the velocity of the
2nd is

A batsman hits back a ball of mass 0.15kg straight in the
direction of the bowler without changing its initial speed of
10 . ms-1 If the ball moves linearly, then the impulse
imparted on it (in Ns) is