Motion in a Straight Line — Physics STD 11 Science — Question

The position coordinate of a moving particle is given by x = 6 + 18t + 9t², where x is in metres and t in seconds.  What is the velocity at t = 2s?

What is gauge pressure?

Why does a person in a satellite feels weightlessness?

Is the damping force constant on a system executing SHM?

What does the flat portion in an isotherm indicate?

How much should the speed of an object be increased so that its kinetic energy remains half of the initial kinetic energy?

When a bomb explodes in mid-air, at its highest point, what is the direction of motion of its core?

Give an example of negative work.

Can the entire kinetic energy be dissipated in a completely inelastic collision?

What is the apparent weight of a man of mass 60kg who is standing on a lift which is moving up with a uniform speed? (g = 10ms^-2)