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.

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1.Easy
0.35 kgv = ?

A 0.35 kg ball at rest is kicked. The foot pushes it with an average force of 500 N for 4 ms. Find the speed v of the ball just after the kick.

m = 0.35 kgFavg = 500 NΔt = 4 ms
v = m/s
2.Easy
0.15 kgv = ?

A 0.15 kg ball at rest is kicked. The foot pushes it with an average force of 200 N for 12 ms. Find the speed v of the ball just after the kick.

m = 0.15 kgFavg = 200 NΔt = 12 ms
v = m/s
3.Medium
1500 kg20 m/s500 kg

A 1500 kg car moving at 20 m/s runs into a stationary 500 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?

m1 = 1500 kgv1 = 20 m/sm2 = 500 kgv2 = 0
ΔK = J
4.Medium
1800 kg19 m/s2000 kg

A 1800 kg car moving at 19 m/s runs into a stationary 2000 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?

m1 = 1800 kgv1 = 19 m/sm2 = 2000 kgv2 = 0
ΔK = J
5.Hard
12 m/s17 m/s

A 0.3 kg ball hits a wall at 12 m/s and bounces straight back at 17 m/s. The contact lasts 10 ms. Find the average force Favg of the wall on the ball.

m = 0.3 kgvin = 12 m/svout = 17 m/sΔt = 10 ms
Favg = N
6.Hard
21 m/s9 m/s

A 0.5 kg ball hits a wall at 21 m/s and bounces straight back at 9 m/s. The contact lasts 40 ms. Find the magnitude of the impulse J the wall gives the ball.

m = 0.5 kgvin = 21 m/svout = 9 m/sΔt = 40 ms
J = N·s

Answer key

  1. 1. v = 5.714 m/s
  2. 2. v = 16 m/s
  3. 3. ΔK = 75000 J
  4. 4. ΔK = 171000 J
  5. 5. Favg = 870 N
  6. 6. J = 15 N·s

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