Let’s see how much you’ve picked up with these experiments and the reading – answer as best as you can. (No peeking at the answers until you’re done!) Just relax and see what jumps to mind when you read the question. You can also print these out and jot down your answers in your science notebook.
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1. What is acceleration?
2. If a car is going 35 mph and comes to a stop at a stop sign. Did it accelerate?
3. Is the moon accelerating?
4. What is force?
5. Does something with a lot of inertia need a lot or a little force to get it going?
6. What makes an object change its motion?
7. What happens if something is moving downhill and the force of gravity is 4 Newtons but the force of friction is 3 Newtons?
8. If you are riding your bike and stop pedaling why do you slow down?
9. If you are riding your bike and air friction, as well as the friction from the bike is 10 Newtons, how much force do you need to exert to keep moving forward at a constant speed?
10. What’s Newton’s Third Law?
11. You are floating in space and your Super 3000 Space Jets short out on you. You are holding a wrench. How do you get back to the space ship?
12. I’m hammering a nail into a hard piece of wood. I’m using one of my son’s light hammers and getting nowhere fast. Finally, I grab a hammer with a heavier head and it goes much easier. Which one of Newton’s Laws did I finally remember?
13. David Letterman, a long time ago, had a race down a hallway with a fire extinguisher and a rolling office chair. As he shot the fire extinguisher one way, the chair zipped down the hallway. (Don’t try this at home!!) Which of Newton’s Laws was Dave delicately demonstrating?
14. I’m riding on my bike and I accidentally hit the front brakes instead of the back brakes. The bike stops and flips me right over the handle bars. As I’m falling, I realize that I am quite a comical example of which of Newton’s Laws?
15. What two things on Earth cause Newton’s First Law to appear to not be true?
For Advanced Students:
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Use d=1/2 at² for these next TWO problems, where d is distance, a is acceleration, and t is time:
1. How far will a gerbil go in 4 seconds if it continues to accelerate at a rate of 3 ft/s²?
2. How fast is something accelerating if it has fallen 50 feet in 10 seconds?
Use F=ma for these next THREE problems, where F is force, m is Mass and a is Acceleration:
3. A 20 kg wagon is pulled with a force of 10 N. How fast does it accelerate?
4. A 40 kg sled experiences a friction force of 20N. What is its negative acceleration?
5. What force is being applied to a 30 kg bike that is slowing at 5 m/s²?
[/am4show] Need answers?