Laws of Motion ...

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.

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)

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?