Conservation of momentum. Jet motion
Answers are for parents and teachers.
1
A 5 kg body at 2 m/s sticks to a stationary 5 kg body. Common speed (m/s)?
1
2
A boat (80 kg) at rest; the person (60 kg) jumps off at 2 m/s toward the shore. Boat speed (m/s)?
1.5
3
Why does a released inflated balloon dart away? Explain with momentum.
Air leaves backward, so by conservation of momentum the balloon goes forward.
4
Why are space rockets multistage (think)?
Spent stages are dropped, reducing mass so the remaining fuel works more effectively.
5
Why should only trained specialists handle fireworks and rockets?
They can burn and explode, causing serious injury.