A block moving horizontally on a smooth surface with a speed of 40 `ms^(-1)` splits into two equal parts. If one of the parts moves at 60 `ms^(1)` in the same direction, then the fractional change in the kinetic energy will be x : 4 where x =__________

A block moving horizontally on a smooth surface with a speed of 40 m/s splits into two parts with messes in the ratio of 1:2 If the smaller part moves at 60 m/s in the same direction , then fractional change in kinetic energy is :

A block movig horizontally ona smooth surace with a speed of 20 m/s bursts into thwo equal parts cobtinuing in the same direction. If one of the parts moves at 30 m/s, with whast speed does the second part move and what is tehfractional change in the kinetic energy?

A particle is moving along x-axis with velocity 40 m/s. It breaks into two parts in mass ratio 1:2. If speed of smaller part is 60 m/s along x-axis then find fractional changes in kinetic energy of system.

A particles has velocity 40 m/s is exploded into two equal parts one with 60 m/s in same direction. The ratio of kinetic energy of individual particles after explosion is K:4, Then K is

An object of mass 10kg moves at a constant speed of 10 ms^(-1) . A constant force, that acts for 4 sec on the object, gives it a speed of 2ms^(-1) in opposite direction. The force acting on the object is :

A block moving on a horizontal surface with velocity 20 ms^(-1) comes to rest because of surface friction over a distance of 40 m. Taking g = 10 ms^(-2) , the coefficient of dynamic friction is :

A body moves at a speed of 100 ms^(-1) for 10 s and then moves at a speed of 200 m s^(-1) for 20 s along the same direction. The average speed is …………………………….,

A block of mass 10 kg is moving horizontally with a speed of 1.5 ms^(-1) on a smooth plane. If a constant vertical force 10N acts on it, the displacement of the block from the point of application of the force at the end of 4 second is