A 100 kg block is released at the top of 30° incline 10 m above the ground. The slight melting of ice renders the surfaces frictionless; calculate the velocity of the foot of the incline.

The 7 m long beam, supported by a cable and resting on a smooth inclined surface at point A, is subjected to 
a 150 KN point load. Determine the position ‘x’ of the point load to maintain equilibrium. Neglect the weight of 
the beam. 

Which example involves a phase change in which heat energy is released by the substance?

1. Freezing of water

2. Vaporization

3. Boiling of water

4. Melting of ice

A force of 100 N is applied on a crate to push it over 10 m factory floor horizontally and the friction force offered by the contact surface is 70 N then calculate the kinetic energy gained by the crate.