Hailstone at `0^@C` from a height of 1 km on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt? (`g=10 m//s`)

A metallic ball of mass 100 g and specific heat capacity 2 J kg^(-1)K^(-1) was dropped from a height of 6 m on to a perfectly non-conducting surface. If 80% of its kinetic energy is converted into heat on striking the surface, find the change in temperature of the ball. (Take g=1000 cm s^(-2) ).

A ball falls on the ground from a height of 10m and rebounds to a height of 8m. What is the percentage loss kinetic energy of the ball? (g=10m//s^(2))

Water fall from a height 50m, If one third of its mechanical energy converted into heat what will be the rise in temperature of water

A body of mass 1 kg is thrown with a velocity of 250 cm *s^(-1) , from a height 8m above the earth's surface . What will be its kinetic energy just before it touches the ground ?

The potential energy of a projectile at its maximum height is equal to its kinetic energy there. If the velocity of projection is 20 m//s^(-1) ,its time of flight is (g=10 m//s^(2))

Hailstones fall from a certain height. If only 1% of the hailstones melt on reaching the ground, find the height from which they fall. (g=10 ms^(-2). L=80" calories/g "and J=4.2"J/calorie")

A body of mass 10 kg falls from a height of 10 m. What will be its kinetic energy just before it touches the ground ? Prove that, this kinetic energy is equal to the potential stored at the initial position of the body. [g=980 cm *s^(-2) ]