Laws of Motion ...

According to newton's second law of motion, F = ma, where F is the force required to produce an acceleration a in a body of mass m. If a = 0 than F = 0. If a force acts on a body for t seconds, the effect of the force is given by impulse = F × t = change in linear momentum of the body.
A cricket ball of mass 150 g. is moving with a velocity of 12 m/s and is hit by a bat so that the ball is turned back with a velocity of 20 m/s. If duration of contact between the ball and the bat is 0.01 sec. The impulse of the force is

According to newton's second law of motion, F = ma, where F is the force required to produce an acceleration a in a body of mass m. If a = 0 than F = 0. If a force acts on a body for t seconds, the effect of the force is given by impulse = F × t = change in linear momentum of the body.
Average force exerted by the bat is

According to newton's second law of motion, F = ma, where F is the force required to produce an acceleration a in a body of mass m. If a = 0 than F = 0. If a force acts on a body for t seconds, the effect of the force is given by impulse = F × t = change in linear momentum of the body.
The force acting on a body whose linear momentum changes by 20 kgms^–1 in 10 sec is

According to newton's second law of motion, F = ma, where F is the force required to produce an acceleration a in a body of mass m. If a = 0 than F = 0. If a force acts on a body for t seconds, the effect of the force is given by impulse = F × t = change in linear momentum of the body.
An impulsive force of 100 N acts on a body for 1 sec What is the change in its linear momentum ?

A block B, placed on a horizontal surface is pulled with initial velocity V. If the coefficient of kinetic friction between surface and block is μ, than after how much time, block will come to rest ?

As shown in figure a block of mass m is attached with a cart. If the coefficient of static friction between the surface of cart and block is μ than what would be acceleration α of cart to prevent the falling of block ?

A force of 98 N is required to just start moving a body of mass 100 kg over ice. The coefficient of static friction is

Two balls of masses m₁ and m₂ are separated from each other by a powder charge placed between them. The whole system is at rest on the ground. Suddenly the powder charge explodes and masses are pushed apart. The mass m₁ travels a distance s₁ and stops. If the coefficients of friction between the balls and ground are same, the mass m₂ stops after travelling the distance