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1.
If a man speeds up by 
, his KE increase by 44%. His original speed in 
is
, his KE increase by 44%. His original speed in is
2.
A particle is moving under the influence of a force given by 
where 
is a constant and 
is the distance moved. The energy (in joules) gained by the particle in moving from 
to 
is
where is a constant and is the distance moved. The energy (in joules) gained by the particle in moving from to is
3.
A body of mass 
moving with a velocity of 
collides head on with a body of mass 
moving in opposite direction with a velocity of 
. After collision, two bodies stick together and move with a common velocity which in 
is equal to
moving with a velocity of collides head on with a body of mass moving in opposite direction with a velocity of . After collision, two bodies stick together and move with a common velocity which in is equal to
4.
A ball is dropped from height 20 m. If coefficient of restitution is 0.9, what will be the height attained after first bounce?
5.
A car is moving with a speed of 
. If the mass of the car is 950 kg, then its kinetic energy is
. If the mass of the car is 950 kg, then its kinetic energy is
6.
A bullet is fired from a rifle. If the riffle recoils freely, then the kinetic energy of the rifle is
7.
In an inelastic collision, what is conserved
8.
A 2.0 kg block is dropped from a height of 40 cm onto a spring of spring constant 
. Find the maximum distance the spring is compressed
. Find the maximum distance the spring is compressed
9.
A machine which is 75 percent efficient, uses 12 joules of energy in lifting up a mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is (in 
)
mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is (in )
10.
A rubber ball is dropped from a height of 5 m on a planet, where the acceleration due to gravity is not known. On bouncing it rises to 1.8 m. The ball loses its velocity on bouncing by a factor of