Momentum & collisions worksheet with answers

Free printable Momentum & collisions 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
0.4 kgv = ?

A 0.4 kg ball at rest is kicked. The foot pushes it with an average force of 500 N for 8 ms. Find the speed v of the ball just after the kick.

m = 0.4 kgFavg = 500 NΔt = 8 ms
v = m/s
2.Easy
5.5 kg900 m/sV = ?

A 5.5 kg rifle, free to move, fires a 15 g bullet at 900 m/s. Both start at rest. Find the recoil speed V of the rifle.

M = 5.5 kgm = 15 gv = 900 m/s
V = m/s
3.Medium
2.5 kg12 m/s5 kg

A 2.5 kg glider moving at 12 m/s makes a perfectly elastic head-on collision with a 5 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.

m1 = 2.5 kgm2 = 5 kgv1 = 12 m/sv2 = 0
v′2 = m/s
4.Medium
5 kg5 m/s3 kg

A 5 kg glider moving at 5 m/s makes a perfectly elastic head-on collision with a 3 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.

m1 = 5 kgm2 = 3 kgv1 = 5 m/sv2 = 0
v′2 = m/s
5.Hard
18 m/s8 m/s

A 0.55 kg ball hits a wall at 18 m/s and bounces straight back at 8 m/s. The contact lasts 40 ms. Find the average force Favg of the wall on the ball.

m = 0.55 kgvin = 18 m/svout = 8 m/sΔt = 40 ms
Favg = N
6.Hard
14 m/s17 m/s

A 0.25 kg ball hits a wall at 14 m/s and bounces straight back at 17 m/s. The contact lasts 20 ms. Find the average force Favg of the wall on the ball.

m = 0.25 kgvin = 14 m/svout = 17 m/sΔt = 20 ms
Favg = N

Answer key

  1. 1. v = 10 m/s
  2. 2. V = 2.455 m/s
  3. 3. v′2 = 8 m/s
  4. 4. v′2 = 6.25 m/s
  5. 5. Favg = 357.5 N
  6. 6. Favg = 387.5 N

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