Question
1. A 800 kg rocket, starting from rest, accelerates upwards from the Earth's surface at a rate of 6.0 m/s 2 . Draw a free
1. A 800 kg rocket, starting from rest, accelerates upwards from the Earth's surface at a rate of 6.0 m/s2.
- Draw a free body diagram of the rocket, labeling all relevant forces
- Sketcha position - time graph for the rocket.
- Sketcha velocity - time graph for the rocket
- Calculate the time it takes the rocket to travel 950 m
- Calculate the force exerted by the rockets engines
- Calculate the work done in the first 15.0 s
2. Two pennies are sitting on a table, 1.2 m high. Both fall off the table at the same time, but one is pushed at a horizontal speed of 4.1 m/s.
- Which penny lands first?
- How far from the table does the pushed penny land?
3. Your best friend is out on a Friday morning run. They travel 6.4km [N] in 22 minutes at a constant velocity, stop for 5 minutes to rest and have some water, then turn and travel 6.4km [S] to get back home in 19 minutes, again at a constant velocity.
- Sketch a position-time graph for Hugh's run
- Sketch a velocity-time graph for his run
- Calculate Hugh's total displacement and average velocity.
4. A hiker gets lost in the forest; first they walk at 1.0 m/s [E] for 12.0 s, then panic and change direction and run at 5.0 m/s [S 450 W] for 15.0 s Find:
- The Hiker's total displacement
- The Hiker's average velocity.
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