Newton’s laws worksheet with answers

Free printable Newton’s laws worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy
m = 22 kgF = 80 Nμ = 0.1a = ?

A 22 kg crate is pushed across a floor with a horizontal force of 80 N. The coefficient of kinetic friction is 0.1. Use g = 9.81 m/s². Find the acceleration a of the crate.

m = 22 kgF = 80 Nμ = 0.1g = 9.81 m/s²
a = m/s²
2.Easy
m = 10 kgF = 75 Nμ = 0.4a = ?

A 10 kg crate is pushed across a floor with a horizontal force of 75 N. The coefficient of kinetic friction is 0.4. Use g = 9.81 m/s². Find the acceleration a of the crate.

m = 10 kgF = 75 Nμ = 0.4g = 9.81 m/s²
a = m/s²
3.Medium
θ = 25°a = ?m = 19 kg

A 19 kg block slides down a slope at 25° to the horizontal. The coefficient of kinetic friction is 0.2. Use g = 9.81 m/s². Find the acceleration a of the block along the slope.

m = 19 kgθ = 25°μ = 0.2g = 9.81 m/s²
a = m/s²
4.Medium
40 kg15°F = 130 Nμ = 0.1

A 40 kg sled is pulled across level snow by a rope at 15° above the horizontal with a force of 130 N. The coefficient of kinetic friction is 0.1. Use g = 9.81 m/s². Find the acceleration a of the sled.

m = 40 kgF = 130 Nθ = 15°μ = 0.1g = 9.81 m/s²
a = m/s²
5.Hard
3 kg6 kgTF = 30 Nμ = 0.25

Two blocks on a level floor are joined by a light horizontal string. A horizontal force of 30 N pulls the front 6 kg block; the 3 kg block is towed behind. The coefficient of kinetic friction is 0.25 for both blocks. Use g = 9.81 m/s². Find the tension T in the connecting string.

m1 = 3 kgm2 = 6 kgF = 30 Nμ = 0.25g = 9.81 m/s²
T = N
6.Hard
m1​ = 2.5 kg5.5 kgθ = 25°

A 2.5 kg block on a ramp at 25° is connected by a light string over a frictionless pulley at the top of the ramp to a hanging 5.5 kg mass. The hanging mass moves down. The coefficient of kinetic friction between block and ramp is 0.1. Use g = 9.81 m/s². Find the tension T in the string.

m1 = 2.5 kgm2 = 5.5 kgθ = 25°μ = 0.1g = 9.81 m/s²
T = N

Answer key

  1. 1. a = 2.655 m/s²
  2. 2. a = 3.576 m/s²
  3. 3. a = 2.368 m/s²
  4. 4. a = 2.242 m/s²
  5. 5. T = 10 N
  6. 6. T = 25.51 N

Full step-by-step solutions: practise this topic on examproblems.com.