Force Test - 7...

A system consists of masses M and m (< M). The centre of mass of the system is

A body of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. The force required to keep the body moving with the same velocity is

Drums of oil are carried in a truck. If a constant acceleration is applied on the truck, the surface of the oil in the drum will

A 20 kg monkey slides down a vertical rope with a constant acceleration of 7.0 ms^-2. If g = 10 Nkg^-1, the tension in the rope will be

A parachutist of weight W strikes the ground with his legs fixed and comes to rest with an upward acceleration of 3g. The force exerted by him on the ground during landing is

A leather ball strikes a wall and falls down. A tennis ball having the same mass and same velocity strikes the same wall and bounces back. Which of the following statements is correct?

A cracker explodes into two fragments of exactly equal masses. The two fragments will move

A body of mass M collides against a wall with velocity V and rebounds with the same speed. Its change of momentum is

A ball drops vertically onto a floor with momentum p and then bounces repeatedly. The coefficient of restitution is e. The total momentum imparted by the ball to the floor is

A bomb of mass 9 kg explodes into two pieces of masses 3 kg and 6 kg. The velocity of mass 3 kg is 16 m/s. The KE of mass 6 kg (in joule) is

There are two blocks A and B of masses 2 kg and 3 kg, respectively. The ground is smooth. P is an external force of 10 N. The force exerted by B on A is

In the given arrangement, the pulleys are fixed and ideal, the strings are light, m₁ > m₂ and S is a spring balance which itself is massless. The reading of S (in units of mass) is

A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. If a force F is applied at one end of the rope, the force which the rope exerts on the block is

A spring obeying Hooke's law has a force constant k. Now, if the spring is cut in two equal parts, the force constant of each part is

A block of mass 20 kg is suspended through two light spring balances as shown in the figure. What are the readings shown by both the scales?

A bicycle moves on a horizontal road with some acceleration. The forces of friction between the road and the front and rear wheels are F₁ and F₂, respectively. Which of the following relations holds true?

A body of mass 60 kg is dragged with just enough force to start moving on a rough surface with coefficients of static and kinetic frictions 0.5 and 0.4, respectively. On applying the same force, what is the acceleration?

A 40 kg slab rests on a frictionless floor. A 10 kg block rests on top of the slab. The static coefficient of friction between the block and the slab is 0.60, while the kinetic coefficient is 0.40. The 10 kg block is acted upon by a horizontal force of 100 N. If g = 9.8 m/s², the resulting acceleration of the slab will be

A man tries to remain in equilibrium by pushing his hands and feet against two parallel walls. For equilibrium,

Which of the following is an essential characteristic of equilibrium?