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.

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1.Easy
35 kgF = ?a = 1.25 m/s²μ = 0.25

A 35 kg crate is pulled across a floor by a horizontal rope. The coefficient of kinetic friction is 0.25. Use g = 9.81 m/s². What pulling force F gives the crate an acceleration of 1.25 m/s²?

m = 35 kgμ = 0.25a = 1.25 m/s²g = 9.81 m/s²
F = N
2.Easy
m = 6 kgF = 75 Nμ = 0.4a = ?

A 6 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 = 6 kgF = 75 Nμ = 0.4g = 9.81 m/s²
a = m/s²
3.Medium
θ = 45°a = ?m = 19 kg

A 19 kg block slides down a slope at 45° to the horizontal. The coefficient of kinetic friction is 0.25. Use g = 9.81 m/s². Find the acceleration a of the block along the slope.

m = 19 kgθ = 45°μ = 0.25g = 9.81 m/s²
a = m/s²
4.Medium
boxv₀ = 3 m/sμ = ?

A box slides across a level floor with an initial speed of 3 m/s and comes to rest after 1.5 m. Use g = 9.81 m/s². Find the coefficient of kinetic friction μ.

v₀ = 3 m/sd = 1.5 mg = 9.81 m/s²
μ =
5.Hard
m1​ = 4.5 kg2 kgno friction

A 4.5 kg block on a horizontal table is connected by a light string over a frictionless pulley to a hanging 2 kg mass. The table is frictionless. Use g = 9.81 m/s². Find the tension T in the string.

m1 = 4.5 kgm2 = 2 kgμ = 0g = 9.81 m/s²
T = N
6.Hard
m1​ = 1 kg3 kgμ = 0.3

A 1 kg block on a horizontal table is connected by a light string over a frictionless pulley to a hanging 3 kg mass. The coefficient of kinetic friction between block and table is 0.3. Use g = 9.81 m/s². Find the tension T in the string.

m1 = 1 kgm2 = 3 kgμ = 0.3g = 9.81 m/s²
T = N

Answer key

  1. 1. F = 129.6 N
  2. 2. a = 8.576 m/s²
  3. 3. a = 5.203 m/s²
  4. 4. μ = 0.3058
  5. 5. T = 13.58 N
  6. 6. T = 9.565 N

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