Laws of Motion ...

The coefficient of static friction (µ_s) between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B, so that the two blocks do not move?
Note: The string and the pulley are assumed to be smooth and massless. (Take g = 10 m/s²)

Momentum of a body is

The first law of motion is also known as the law of 

According to first law of motion

Two blocks of masses m₁ = 3 m and m₂ = 2 m are suspended from a rigid support by two inextensible uniform wires A and B. Wire A has negligible mass and wire B has a mass m₃ = m as shown in the figure. The whole system of blocks, wires and the support has an upward acceleration a.



The tension at the midpoint C of wire B is

force is required

Directions: The following question has four choices out of which ONLY ONE is correct.

Angular velocity of hour hand of a watch is

When a horse pulls a wagon, the force that causes the horse to move forward, is the force that

The minimum force required to move a body up an inclined plane of inclination 30^o is found to be thrice the minimum force required to prevent it from sliding down the plane. The coefficient of friction between the body and the plane is 

A cyclist starts from the centre 'O' of a circular park of radius 1 km, reaches the edge 'P' of the park, then cycles along the circumference and returns to the centre along 'QO' as shown in the figure. If the round trip takes 10 min, the net displacement and average speed of the cyclist respectively (in m and km/hr) are

A cubical block of mass 'm' rests on a rough horizontal surface. μ is the coefficient of static friction between the block and the surface. A force mg, acting on the cube at an angle θ with the vertical side of the cube, pulls the block. If the block is to be pulled along the surface, then the value cot(θ/2) is 

A stone of mass m tied to a string of length l is rotating along circular path with constant speed v. The torque on the stone is 

According to Newton's second law of motion, force is equal to 

A stone of mass 200 g is tied to the end of a 1 m long string. Holding the string at the other end, it is whirled in horizontal circles. If the speed of the stone is 10 m/s, calculate the centripetal force.

Directions: The following question has four choices out of which ONLY ONE is correct.

_{What is the value of linear velocity, if angular velocity is 3– 4+  and distance from the centre is 5 – 6 + 6?}

Directions: The following question has four choices out of which ONLY ONE is correct.

The rate of change of momentum is

Directions: The following question has four choices out of which ONLY ONE is correct.

The maximum and minimum tension in the string whirling in a circle of radius 2.5 m with constant velocity are in the ratio 5 : 3 then its velocity is (g = 9.8 m/s²)

The figure shows two blocks A and B pushed against a smooth wall with force F. The wall is smooth, but the surface of contact of A and B is rough. Which of the following is true for the system of blocks?

Inertia refers to

A force acts for 10 s on a body of mass 100 kg, after which the force ceases to act and the body describes 160 m in the next 8 s. What is the magnitude of the force?

According to Newton's second law of motion

A spring is compressed between two blocks of masses m₁ and m₂ placed on a horizontal frictionless surface as shown in the figure. When the blocks are released, they have initial velocities of v₁ and v₂ as shown. The blocks travel distances x₁ and x₂, respectively, before coming to rest. The ratio x₁/x₂ is

A ball of mass 0.6 kg attached to a light inextensible string rotates in a vertical circle of radius 0.75 m. It has a speed of 5 ms^-1 when the string is horizontal. Tension in string when it is horizontal on the other side is (Take g = 10 ms^-2)

A force F is applied horizontally to a block A of mass m₁ which is in contact with a block B of mass m₂ as shown in the figure. If the surfaces are frictionless, the force exerted by A on B is given by:

A small block is shot into each of the four tracks as shown below. Each of the frictionless tracks rises to the same height. The speed with which the block enters the tracks is the same in all the cases. At the highest point of the track, normal reaction is the maximum in