Lesson 38 Practice Quiz

Lesson 38 Practice Quiz

9th Grade

15 Qs

quiz-placeholder

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Lesson 38 Practice Quiz

Lesson 38 Practice Quiz

Assessment

Quiz

Physics

9th Grade

Practice Problem

Hard

Created by

Ravi Sawh

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for calculating impulse in a collision?

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes the principle of momentum conservation?

Momentum is always lost in a collision.

Momentum is conserved only in elastic collisions.

The total momentum of a closed system remains constant if no external forces act on it.

Momentum is conserved only in inelastic collisions.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary principle behind rocket propulsion?

Conservation of energy

Newton's first law of motion

Conservation of momentum

Gravitational force

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the impulse experienced by an object if a force of 10 N is applied for 5 seconds.

50 Ns

15 Ns

5 Ns

25 Ns

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 2 kg object moving at 3 m/s collides with a stationary 1 kg object. If the collision is perfectly elastic, what is the velocity of the 2 kg object after the collision?

1 m/s

2 m/s

3 m/s

0 m/s

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain how the impulse-momentum theorem is applied in car safety features like airbags.

Airbags increase the time over which the force acts, reducing the force experienced by passengers.

Airbags decrease the time over which the force acts, increasing the force experienced by passengers.

Airbags do not affect the impulse experienced by passengers.

Airbags increase the momentum of the passengers.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A rocket expels gas at a velocity of 2000 m/s. If the mass of the expelled gas is 5 kg, what is the change in momentum of the rocket?

10000 kg·m/s

4000 kg·m/s

2000 kg·m/s

5000 kg·m/s

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