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30 problems
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1.
Answer, and give a reason. A firework rocket bursts in the air.
High School (11–12) · Rotational Motion, Momentum and Collisions
StemPy Lab
Easy
2.
A 9.0 kg shell is fired at 50 m/s at 55° above level ground.
High School (11–12) · Rotational Motion, Momentum and Collisions
StemPy Lab
Medium
3.
A 55 kg boy stands at the front of a 165 kg canoe on still water.
High School (11–12) · Rotational Motion, Momentum and Collisions
StemPy Lab
Medium
4.
A 45 kg girl and a 60 kg boy stand at rest on smooth ice and push each other away.
High School (11–12) · Rotational Motion, Momentum and Collisions
StemPy Lab
Easy
5.
In a ballistic pendulum, a bullet stops inside a hanging block, which then swings up.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Medium
6.
A 1.5 kg ball moving at 5.0 m/s makes an elastic, off-centre collision with an identical ball at…
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Hard
7.
An 8.0 g bullet is fired into a 1.6 kg block hanging on strings, and stays inside.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Hard
8.
A ball dropped from 1.6 m bounces back to 0.90 m.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Medium
9.
A 9.0 kg shell at rest bursts into two pieces of 3.0 kg and 6.0 kg.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Hard
10.
A 5.0 kg trolley moving east at 4.0 m/s meets a 3.0 kg trolley moving west at 6.0 m/s.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Medium
11.
A 0.25 kg ball moving at 2.2 m/s hits an identical ball at rest, head-on and elastically.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Easy
12.
A 3.0 kg ball moving at 5.0 m/s makes a head-on elastic collision with a 2.0 kg ball at rest.
High School (11–12) · Momentum and Collisions, Work, Energy and Power
StemPy Lab
Medium
13.
A girl of mass 48 kg stands at one end of a boat of mass 152 kg and length 3.5 m.
High School (11–12) · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Hard
14.
A trolley of mass 2.8 kg runs at 3.5 m/s into a trolley of mass 1.2 kg at rest.
High School (11–12) · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Medium
15.
A rifle of mass 4.2 kg fires a bullet of mass 12 g at 750 m/s.
High School (11–12) · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Medium
16.
A lamp hangs at rest from the ceiling on a cord.
High School (11–12) · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Easy
17.
A rocket of total mass 900 kg floats at rest in empty space.
High School (9–10), General · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Medium
18.
You blow up a balloon and let it go. It zooms round the room.
High School (9–10), General · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Easy
19.
A 4 kg trolley is at rest. A spring inside it is released and it splits in two.
High School (9–10), General · Momentum and Collisions
StemPy Lab
Medium
20.
A 1000 kg cannon on smooth flat ground fires a 10 kg ball at 120 m/s to the right.
High School (9–10), General · Momentum and Collisions
StemPy Lab
Medium
21.
Trolley A (3 kg) at 5 m/s hits trolley B (2 kg) at rest.
High School (9–10), General · Momentum and Collisions
StemPy Lab
Medium
22.
A 45 kg boy stands on a 180 kg boat at rest on calm water.
High School (9–10), General · Momentum and Collisions
StemPy Lab
Medium
23.
In a crash, a 60 kg passenger moving at 15 m/s must stop.
High School (9–10), General · Newton's Laws of Motion, Momentum and Collisions
StemPy Lab
Easy
24.
A 45 kg child jumps off a wall 1.8 m high.
High School (9–10), General · Newton's Laws of Motion, Momentum and Collisions
StemPy Lab
Medium
25.
A 0.4 kg ball moves towards a wall at 7 m/s and bounces straight back at 5 m/s.
High School (9–10), General · Momentum and Collisions, Newton's Laws of Motion
StemPy Lab
Medium
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