Physics Past Questions and Answers

A body rolls down a slope from a height of 100m. its velocity at the foot of the slope is 20ms<sup style='font-size: smaller;'>-1</sup>. What percentage of its initial potential energy is converted into kinetic energy? [g = 10ms<sup style='font-size: smaller;'>-1</sup>]

The coefficient of static friction between a 40kg crate and concrete surface is 0.25. Find the magnitude of the minimum force needed to keep the crate stationary on the concrete base inclined at 45o to the horizontal. [G = 10ms-1]

If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to

The mechanical advantage(MA) of an inclined plane depends on

A load of 5N gives an extension of 0.56cm in a wire which obeys Hooke's law. What is the extension caused by a load of 20N?