Laws of Motion ...

A body floats in a liquid contained in a beaker. If the whole system as shown in figure falls freely under gravity, then the upthrust on the body due to liquid is

A bird weighs 2 kg and is inside a closed cage of 1 kg. If it starts flying, then what is the weight of the bird and cage assembly?

A man is standing on a balance and his weight is measured. If he takes a step in the left side, thenweight

A cold soft drink is kept on the balance. When the cap is open, then the weight

A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5 kg) flies upward in the cage with an acceleration of 2 m/s². The spring balance will nowrecord a weight of

A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about thescale reading is

The tension in the spring is

Rocket propulsion is associated with

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

The rate of mass of the gas emitted from rear of a rocket is initially 0.1 kg/s. If the speed of the gas relative to the rocket is 50 m/s and mass of the rocket 2 kg then the acceleration of the rocket in m/s² is