Physics Past Questions and Answers

If a cage containing a truck of coal weighing 750 kg is raised to a height of 90 m in a minute, what is the total power expended?
[g = 10 ms²]

An object of mass 80 kg is pulled on a horizontal rough ground by a force of 500 N. Find the coefficient of static friction.
[g = 10 ms^-2]

If a heavy barrel is rolled up a plane inclined at 30° to the horizontal. its velocity ratio will be

I. Density of the liquid.
II. Acceleration due to gravity.
III. Type of container of the liquid.
IV. The constituents of the liquid.
which of the above conditions will NOT affect the pressure of fluid?

If a load of mass 10N stretched a cord by 1.2cm, what is the total work done?