Mechanics of Particles

What causes the motion of a body which is initially in the state of rest?

• Force

• Displacement

• Speed

• Energy

Rocket works on the principle of conservation of energy

• True

• False

In a perfectly elastic collision, which quantity is/are conserved

• Momentum only

• Energy only

• Both

• Neither energy Nor momentum

How does the variable mass system affects the rocket’s motion

• The mass has no effect on the rocket’s speed

• The mass increase stabilizes its flight path

• The mass decrease increases acceleration over time

• The mass remains constant throughout the flight

Thrust acting on the rocket to move it forward is

Velocity of the rocket at any instant is

What does impact parameter describe in a collision

• Scattering angle

• Relative velocity

• Distance of closest approach

• Total energy

The ratio of number of scattering particles into solid angle per unit time to the incident intensity is called _______________

How do we calculate force in a variable mass constant velocity system?

A straight moving bus takes a sharp right turn. What will happen to the passengers sitting inside the bus?

• They will tilt rightwards

• They will tilt leftwards

• They will stay the way they were

• They will start jumping