This is due at the beginning of our first class next week.
Phinal Physics Phun-signment! (Get it?)
1. You have a model rocket with a mass of 0.050 kg. It contains an engine that delivers a thrust force of 10-N for 0.8 seconds. Answer the following questions based on this data.
a. What is the weight of this rocket?
b. What is the NET force acting on this rocket during the thrust period? (Keep in mind that the engine pushes up, while the weight acts down.)
c. What will be the acceleration of this rocket?
d. If we assume that the rocket starts at rest, what will be the final velocity of the rocket before the engine stops burning?
e. How high will the rocket go during this time period?
f. Will the rocket continue to rise after the engine burns out? If not, how far additionally will it rise?
2. Consider standing on a scale in an elevator. The scale has a spring inside of it, causing an "effective weight" measurement to be given. A 130-lb (while at rest) woman stands on the scale in the elevator. Answer the questions below thusly: equal to 130 lb, less than 130 lb, greater than 130 lb, 0 lb.
a. If the elevator is moving upward at a constant velocity, what will the scale read?
b. If the elevator is moving downward at a constant velocity, what will the scale read?
c. If the elevator is moving upward at a constant acceleration, what will the scale read?
d. If the elevator is moving downward at a constant acceleration, what will the scale read?
e. If the elevator were freely falling (uh oh....), what will the scale read?
3. Pick one idea or topic that has captured your imagination during the motion/mechanics unit. Describe or discuss it briefly.
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