Laws of Motion — Physics STD 11 Science — Question

A monkey climbs up a slippery pole for 3 seconds and subsequently slips for 3 seconds. Its velocity at time t is given by v(t) = 2t(3 - t); 0 < t < 3 and v(t) = -(t - 3)(6 - t) for 3 < t < 6s in m/s. It repeats this cycle till it reaches the height of 20m.
At what time is its acceleration maximum in magnitude?

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:
Work done by friction on a body sliding down an inclined plane.

Can a motion be periodic but not oscillatory? If your answer is yes, give an example and if not explain why?

In a real gas the internal energy depends on temperature and also on volume. The energy increases when the gas expands isothermally. Looking into the derivation of C_P - C_v = R, find whether C_P - C_v will be more than R, less than R or equal to R for a real gas.

When a solid is pressed what is the effect on the potential energy of its atoms?

A hole is made in a container at a depth below the free surface of the liquid whose radius is r. Write the formula for the ejection velocity of the liquid jet coming out of this hole.

A cloudy night is hotter than a clear sky night. Why?

Three containers have different area on the top surface and same base area. If equal volume of a liquid is put in them which will have more pressure at its base?