Gravitation — Physics STD 11 Science — Question

The kinetic energy of an object is 40 joules, if its mass is 5 kg then what will be the velocity of the object?

A shell is fired from a cannon and it explodes at the top. What will be the change in its momentum and kinetic energy?

Relation between phase difference and path difference.

When two flat pieces of lead are pressed why do they stick?

A pendulum is making one oscillation in every two seconds. What is the frequency of oscillation?

Should the centre of mass of a body necessarily lie inside the body? Explain.

We often say, "A current is going through the wire." What goes through the wire, the charge or the current?

A string clamped at both ends vibrates in its fundamental mode. Is there any position (except the ends) on the string which can be touched without disturbing the motion? What if the string vibrates in its first overtone?

What is the phase difference between particle velocity and particle acceleration in SHM?