Laws of Motion Questions

Three blocks A, B and C of masses 4 kg, 2 kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4 kg block, then the contact force between ...

A wire, which passes through the hole in a small bead, is bent in the form of quarter of a circle. The wire is fixed vertically on ground as shown in the figure. The bead is released from near the top...

A balloon with mass m is descending down with an acceleration a (where a

In the arrangement shown in figure, coefficient of friction between the two blocks is m = . The force of friction acting between the two blocks is :-...

A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of 45o with the initial vertical direction is...

Two masses m1 = 5 kg and m2 = 4.8 kg tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when lift free to move? (g = 9.8 m/s2)...

A block of mass M is pulled along a horizontal friction surface by a rope of mass m. If a force P is applied at the free end of the rope, the force exerted by the rope on the block is...

A rocket with a lift-off mass 3.5 × 104 kg is blasted upwards with an initial acceleration of 10 m/s2. Then the initial thrust of the blast is

A solid sphere, a hallow sphere and a ring are released from top of an inclined plane (frictionless) so that they slide down the plane. Then maximum acceleration down the plane is for (no rolling)...

When forces F1, F2, F3 are acting on a particle of mass m such that F2 and F3 are mutually perpendicular, then the particle remains stationary. If the force F1 is now removed then the acceleration of ...

A light string passing over a smooth light pulley connects two blocks of masses m1 and m2 (vertically). If the acceleration of the system is g/8, then the ratio of the masses is...

Three identical blocks of masses m = 2kg are drawn by a force F = 10.2 N with an acceleration of 0.6 ms-2 on a frictions surface, then what is the tension (in N) in the string between the blocks B and...

One end of a massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. With what value of ...

The rocket engine lift a rocket from the earth, beacause hot gases :

A person is standing in elevater. In which situation he finds his weight less?

An 80 kg person is parachuting and is experiencing a downward acceleration of 2.8m / s2. The mass of the parachute is 5kg. The upward force on the open parachute is (Take g = 9.8 m / s2.)...

Block of mass 4 kg is to be kept at rest against a smooth vertical wall by applying a force F as shown in figure. The force required is :-...

If there is no friction between any two surfaces in the given figure, then the correct statement (s) is/are...

The law of conservation of momentum is based on Newton′s :-

The retarding force required to reduce velocity of a 3 kg body from 0·75 m/s to 0·25 m/s in 0·02 sec will be -