Projectile and Momentum

What determines the effects of a collision?

• The color and shape of the colliding bodies.

• The temperature and pressure of the colliding bodies.

• The speed and mass of the colliding bodies.

• The volume and density of the colliding bodies.

What is impulse?

• The product of mass and velocity.

• The product of force and distance.

• The product of force and time.

• The product of mass and acceleration.

What happens to the vertical velocity of a projectile during its fall?

• It decreases.

• It remains constant.

• It increases.

• It becomes zero.

A projectile is launched horizontally with an initial speed of 10 m/s. What will be its horizontal speed after 3 seconds?

• 5 m/s

• 10 m/s

• 15 m/s

• 20 m/s

A ball is thrown horizontally from a cliff with a speed of 20 m/s. What will be its horizontal speed after 2 seconds?

• 10 m/s

• 20 m/s

• 30 m/s

• 40 m/s

What is an elastic collision?

• A collision where the colliding bodies stick together after impact.

• A collision where the colliding bodies separate after impact.

• A collision where the colliding bodies change shape after impact.

• A collision where the colliding bodies change color after impact.

What happens to the vertical velocity of a projectile during its flight?

• It increases.

• It remains constant.

• It decreases.

• It becomes zero.

What is an inelastic collision?

• A collision where the colliding bodies stick together after impact.

• A collision where the colliding bodies separate after impact.

• A collision where the colliding bodies change shape after impact.

• A collision where the colliding bodies change color after impact.

What happens to the momentum of an object if its speed changes?

• The momentum remains constant.

• The momentum decreases.

• The momentum changes.

• The momentum becomes zero.

A force of 5 N is applied on an object for 2 seconds. What is the impulse imparted to the object?

• 2.5 Ns

• 10 Ns

• 7.5 Ns

• 12.5 Ns