Draw lines (using different colors) to match the terms to the situations that match.
1 point
1
Question 2
2.
Imagine that you are hovering next to a space shuttle and your buddy of equal mass, who is moving a 4 m/s with respect to the ship, bumps into you. If he holds onto you, how fast do you both move with respect to the ship? (Round to the nearest whole number with units)
1 point
1
Question 3
3.
A 1250 kg car is stopped at a traffic light. A 3550 kg truck moving at 8.33 m/s hits the car from behind. If bumpers lock, how fast will the two vehicles move? (Round to one decimal place and include units)
4 points
4
Question 4
4.
Thinking of the conservation of momentum and impulse, would it be safer to drive more slowly or more quickly in a crowded city area (like Downtown Davenport). Why? (1 point-answer, 2 points-reasoning/explanation, 1 point-using vocabulary above)
3 points
3
Question 5
5.
Explain how airbags work. Be sure to use your vocabulary (impulse, time, momentum)
2 points
2
Question 6
6.
Free-body diagrams for two situations are shown below. For each situation, determine the net force acting upon the object.
1 point
1
Question 7
7.
A book is at rest on a table-top. A free-body diagram for this situation looks like this:
1 point
1
Question 8
8.
A girl is suspended motionless from a bar which hangs from the ceiling by two ropes.
A free-body diagram for the girl in this situation looks like this: