Kinetic Theory — Physics STD 11 Science — Question

What does the slope of the velocity-time graph indicate?

A particle is in linear simple harmonic motion between two points, A and B, 10cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when it is:

At 2cm away from B going towards A.

An impulse is applied to a moving object with a force at an angle of 20° w.r.t. velocity vector, what is the angle between the impulse vector and change in momentum vector?

What is the angle between frictional force and instantaneous velocity of the body moving on a rough road?

When a particle moves with constant velocity, its average velocity, its instantaneous velocity and its speed are all equal. Comment on this statement.

In simple harmonic motion by what phase angle is value of the displacement ahead of its acceleration value?

A ladder is learning against a wall. If it slips, where will its instantaneous center of rotation be?

Underline the correct alternative:
In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy/ total linear momentum/ total energy of the system of two bodies.

The orbital velocity v of a satellite may depend on its mass m, distance r from the centre of earth and acceleration due to gravity g. Obtain an expression for orbital velocity.

In an experiment on photoelectric effect, a photon is incident on an electron from one direction and the photoelectron is emitted almost in the opposite direction. Does this violate conservation of momentu?