Motion of System of Particles and Rigid Bodies — Physics STD 11 — Question

Give some uses of geostationary satellites.

A body describes simple harmonic motion with an amplitude of 5 cm and a period of 0.2s. Find the acceleration and velocity of the body when the displacement is 5 cm.

What happens to the P.E. of a bubble when it rises in water?

Define specific heat capacity at constant volume.

“Displacement vector is basically a position vector”. Comment on it.

What is the angle between velocity vector and acceleration vector in uniform circular motion?

A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then find its time period in seconds.

Write a note an instantaneous acceleration.

When does a rigid body said to be in equilibrium? State the necessary condition for a body to be in equilibrium.

A mass of 2 kg is suspended with thread AB. Thread CD of the same type is attached to the other end of 2 kg mass.

• Lower end of the lower thread is pulled gradually, hander and hander is the downward direction so as to apply force on AB Which of the thread will break & why?
• If the lower thread is pulled with a jerk, what happens?