NAME Kimber and Emily
CLASS Science 3
DATE May 1, 2008
FORCES AND MOTION QUIZ
At the beginning of every section look at the clock and time how long it takes for you to do each section. At the end of the test, fill in the table and graph your results.
VOCABULARY: 4.5 (1/2 a point each)
Circle the best answer to fill in the blanks or fill in the blank with the best answer
1. Newton’s First Law of Motion states that an object at rest will remain (at rest / in motion), and an object that is moving at a constant (momentum / velocity)will (stop / continue) moving at a constant (momentum / velocity) unless acted upon by an (equal / unbalanced) force.
at rest, velocity, continue, velocity, unbalanced
2. Newton’s Second Law of Motion states that the net (force / energy) on an object is (equal / unequal) to its (acceleration / average speed) or mass.
force, equal, acceleration,
3. Newton’s Third Law of Motion states that if one object (removes / exerts) a force on another object, then the second object (exerts/ removes) a force of equal strength in the (opposite / same) direction on the first.
exerts, , opposite
4. ______is the product of an object’s (mass / speed) and (average speed / velocity).
momentum, mass, velocity
5. ______the (force / energy) that one surface exerts on another when the two (rub against / repel) each other.
friction, force, rub
6. ______is the force that ______objects towards each other.
gravity, pulls
7. ______is the ______and object travels in ____ unit of ______.
speed, distance, travels, time
8. ______is (speed / distance) in a given direction.
velocity, speed,
9. ______is the rate at which (velocity / distance) changes.
acceleration, rate, velocity
RECORD HOW LONG IT TOOK YOU TO TAKE THIS SECTION OF THE QUIZ IN MINUTES AS BEST YOU CAN. ______
MULTIPLE CHOICE: 1.5 (1/2 a point each)
Circle the best answer
1. In the film Physics of Motion the skydiver jumped off a crane without a special suit and then with a squirrel suit. With the squirrel suit did he fall:
A. Slower
B. Faster
C. The same
D. None of the above
2. How do you calculate speed?
A. time/distance=speed
B. distance/time=speed
C. direction/ distance=speed
D. amount of force/ time=speed
3. What word best describes the difference of velocity and speed?
A. Speed
B. Distance
C. Direction
D. None of the above
RECORD HOW LONG IT TOOK YOU TO TAKE THIS SECTION OF THE QUIZ IN MINUTES AS BEST YOU CAN. ______
SHORT ANSWER: 6points
Answer each question as fully as you can with complete sentences.
3points
1. Make a Venn Diagram that compares speed, velocity and acceleration. (must include how to calculate) *list
1points
2. Explain how the forces of gravity and friction affect how the balloon rocket traveled and worked. Explain how your model worked or didn’t work because of these forces.
In order to do this lab we had to make sure that the forces of friction and gravity weren’t skewing our results too drastically. We didn’t want too much weight on the wire because that would pull the rocked down because of gravity and because that would create more friction. My model tried to use as little weight as possible so that these forces wouldn’t apply as much. We stuck with a simple design of a straw, the least possible amount of tape, a balloon and that was it. If we tried to add pencils we put the same amount on both sides, top and bottom, so that the weigh would be even.
1points
3. From the Physics of Motion film, explain how a bike starts, keeps moving, speeds up and slows down.
A bike starts when the biker starts to pedal and then the forward motion begins. Then air resistance and friction created by the bike starts to balance out the forward pressure. This is how the biker keeps a constant speed. If the biker wants to speed up or accelerate they must unbalance the forces by pedaling harder and increasing the forward motion. Then the air resistance and friction will balance out again and the bike will be moving at a faster constant pace. If the biker wants to slow down, it has to lessen the forward motion so that the friction and air resistance is greater. Then they will be traveling at a slower constant pace.
1points
4. Explain what is happening in the Position Time Graph. Give a real life example of what this graph may be representing OR what you would do to replicate this graph during the motion lab. (accelerate, stop, constant…)
The person starts standing at half a meter away, and then it accelerates to a distance of about two meters and then stops and then accelerates again to a distance of about three meters.
RECORD HOW LONG IT TOOK YOU TO TAKE THIS SECTION OF THE QUIZ IN MINUTES AS BEST YOU CAN. ______
ACTIVITY: 8points
3points
1. The distance traveled by two balls is shown in the table below. Graph the information and determine which ball moves at a constant speed throughout the entire distance. Describe the speeds of both balls and a possible way that these results were created.
Time(s) / Ball One(m) / Ball Two(m)1 / 1.5 / .5
2 / 3 / 2
3 / 4.5 / 3
4 / 6 / 5
*graph is part of answer
The first ball moves at a constant speed the whole time. The other ball didn’t, it got faster then slower then faster. The first ball may have got these results by just being rolled on a flat surface, but not stopping on its own or else it would have slowed down. The other ball could have rolled over a series of hills so it went up and down and slowed down while going up and sped up while going down.
RECORD HOW LONG IT TOOK YOU TO TAKE THIS SECTION OF THE QUIZ IN MINUTES AS BEST YOU CAN. ______
5points
Now, using all the data you collected from taking you test, fill in the table below and then graph your results. Then find the average speed it took you to take the test up to this point as well as the speed for each section. Then write a short concluding summary on what knowledge you can get from these results. (ex. what you are good at, if you take longer on short answer, if you needed to know you vocabulary better because it took longer etc.)
SECTION / START TIME / END TIME / TOTAL PER SECTIONVocabulary
Multiple choice
Short answer
Activity
Answers will variey