What determines the period of a mass-spring system in SHM?

A damping force halves the amplitude in 20 s for m = 0.5 kg. What is b (kg/s)?

Calculate the escape velocity from Earth’s surface (in m/s).

How much work is needed to move a 1000 kg satellite from Earth’s surface to 1000 km altitude (J)?

What is the gravitational potential energy of two 10 kg masses placed 2 m apart? (J)

The motion of a particle connected to a spring is described by x = 10 sin (pt). At what time (in s) is the potential energy equal to the kinetic energy?

A person looks horizontally at the edge of a swimming pool. If its length is 5 m, and the pool is filled to the surface, to what depth (in m) could the observer see? (n for water is 1.33)

A mirror forms an upright image equal in size and at same distance as object. What type is it?

In an RL circuit, if R = 10 Ω and L = 2 H, how long until current reaches 63% of final value?

Which condition must be met for a real image in a converging lens?