Lelfy

Newtonian Mechanics Quiz

Newtonian Mechanics: ten practice questions on forces and motion, with concepts and calculations. Every answer is explained.

Free, with no sign-up.

ByLelfy Editorial Team

For High school students and adults reviewing the topic.

About 12 minutes. 10 questions.

How does it work?

  1. Choose one answer or enter a number in the stated unit, then check it.
  2. Your first submitted answer counts toward the score. Read the explanation before moving on.
  3. Use the quantities provided. There is no timer.

What will you get?

See your first-attempt score and an explanation for every answer.

Question 1A cart moves right at constant velocity in an inertial frame. What is its net force?
Question 2A 4 kg cart has a net horizontal force of 12 N. Find its acceleration.

Answers within 0.01 m/s² of the expected value are accepted.

Question 3A 20 N push acts right on a 4 kg cart. A friction force of 8 N acts left. Take right as positive. Find the acceleration.

Answers within 0.01 m/s² of the expected value are accepted.

Question 4A book rests on a table. Which force is the third-law partner of the table pushing up on the book?
Question 5A 2 kg cart starts from rest with constant acceleration of 2 m/s² for 5 s. Find its displacement.

Answers within 0.01 m of the expected value are accepted.

Question 6A 60 kg person stands where g = 9.8 m/s². Find the magnitude of their weight.

Answers within 0.01 N of the expected value are accepted.

Question 7A crate remains at rest while a horizontal push increases from 5 N to 8 N. The maximum static friction is 12 N. What happens to static friction?
Question 8A constant net force of 200 N acts for 0.15 s. Find the impulse magnitude.

Answers within 0.01 N·s of the expected value are accepted.

Question 9A 2 kg cart moving at 3 m/s sticks to a stationary 1 kg cart. External impulse is negligible. Find their shared velocity.

Answers within 0.01 m/s of the expected value are accepted.

Question 10A cart is moving right but slowing down. In an inertial frame, which way does its net force point?

Answer every question to see and share your score.

Read the topic guide