Systems of Particles and Rotational Motion — Physics STD 11 Science — Question

What will be the change in the time period of a loaded spring when taken to moon?

A ladder is at rest with its upper end against a wall and the lower end on the ground. Is the ladder more likely to slip, when a man stands on it at the bottom or at the top? Give reason.

When a stone hits on a glass window, it breaks the glass, but when a gun bullet is fired at it, it passes only by making a hole in the window. Why?

The two ends of a spring balance are pulled each by a force of 10kg wt. What will be the reading of the balance?

On what factors does the energy of a harmonic oscillator depend?

Suppose a charged particle moves with a velocity v near a wire carrying an electric current. A magnetic force, therefore, acts on it. If the same particle is seen from a frame moving with velocity v in the same direction, the charge will be found at rest. Will the magnetic force become zero in this frame? Will the magnetic field become zero in this frame?

Give an example of a body possessing zero velocity and still accelerating.

In place of a wire, another wire of same length and same material but double the diameter is suspended. (i) What would be the effect on its increase in length under the given weight? (ii) What would be the effect on the maximum weight it bears?

Do all the drops of rain (big and small) reach the earth with same terminal velocity?