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
m = 10 kgF = 45 Nμ = 0.2a = ?

A 10 kg crate is pushed across a floor with a horizontal force of 45 N. The coefficient of kinetic friction is 0.2. Use g = 9.81 m/s². Find the acceleration a of the crate.

m = 10 kgF = 45 Nμ = 0.2g = 9.81 m/s²
a = m/s²
2.Easy
m = 4 kgF = 65 Nμ = 0.4a = ?

A 4 kg crate is pushed across a floor with a horizontal force of 65 N. The coefficient of kinetic friction is 0.4. Use g = 9.81 m/s². Find the acceleration a of the crate.

m = 4 kgF = 65 Nμ = 0.4g = 9.81 m/s²
a = m/s²
3.Medium
boxv₀ = 6 m/sμ = ?

A box slides across a level floor with an initial speed of 6 m/s and comes to rest after 4.6 m. Use g = 9.81 m/s². Find the coefficient of kinetic friction μ.

v₀ = 6 m/sd = 4.6 mg = 9.81 m/s²
μ =
4.Medium
8.5 kg5.5 kg

Masses of 8.5 kg and 5.5 kg hang on either side of a light, frictionless pulley, connected by a light string. The system is released from rest. Use g = 9.81 m/s². Find the tension T in the string.

m1 = 8.5 kgm2 = 5.5 kgg = 9.81 m/s²
T = N
5.Hard
m1​ = 10 kg4.5 kgno friction

A 10 kg block on a horizontal table is connected by a light string over a frictionless pulley to a hanging 4.5 kg mass. The table is frictionless. Use g = 9.81 m/s². Find the acceleration a of the system.

m1 = 10 kgm2 = 4.5 kgμ = 0g = 9.81 m/s²
a = m/s²
6.Hard
θ = 25°blockv₀ = 10 m/s

A block is given a push so that it starts sliding up a ramp at 25° with a speed of 10 m/s. The coefficient of kinetic friction is 0.3. Use g = 9.81 m/s². How far d along the ramp does it slide before it stops?

v₀ = 10 m/sθ = 25°μ = 0.3g = 9.81 m/s²
d = m

Answer key

  1. 1. a = 2.538 m/s²
  2. 2. a = 12.33 m/s²
  3. 3. μ = 0.3989
  4. 4. T = 65.52 N
  5. 5. a = 3.044 m/s²
  6. 6. d = 7.339 m

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