Motion
Name: _____________________________
Study Guide
Date: ________________ Per: _______
1. What is motion? ________________________________________________________________________
2. How do you know that motion has occurred? _________________________________________________
3. What is the difference between distance and displacement? ______________________________________
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4. A car travels 30 miles south, 10 miles east, 50 miles north, 10 miles west, and 10 miles south. What is its
distance? ___________________ What is its displacement? ____________________
5. How is instantaneous speed different than average speed? ________________________________________
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6. How is speed different than velocity? _________________________________________________________
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7. What is the formula for speed? _______________________
8. How can velocity change? (there are 2 ways)
- ____________________________________
- ____________________________________
9. What is the difference between positive and negative acceleration? ________________________________
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10. What is the formula for acceleration? ________________________________
11. There are two ways to accelerate an object. What are they? (hint: speeding up and slowing down is only
ONE way) ___________________________________________________________________________
12. By looking at the units of each of the following values, label it as:
distance (d), time (t), speed (s), velocity (v), acceleration (a), mass (m), or Force (F) .
80 g ______
180 mph _______
3.4 m/s _______
10 N ______
18 m/s/s _______
180 mph west _______
3.4 m/s2 ______
30 m ______
45 kg ______
14 mph/s ______
10 s ______
13. Newton’s Laws:
Law of Inertia: ____________________________________________________________________
Real – World Example: _________________________________________________
F = ma: _________________________________________________________________________
Real – World Example: _________________________________________________
Law of Action/Reaction: _____________________________________________________________
Real – World Example: __________________________________________________
14. Which of Newton’s laws apply to each example? (name AND number)
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When I punch a wall, it punches me back. __________________________________
When I push a tennis ball and a bowling ball, the tennis ball has more acceleration. __________
When a glass is thrown against a wall, it shatters. _____________________________
When I hit the gas pedal, it throws me back against my seat. __________________________
15. When I slam on the brakes, why does my drink splatter all over the radio? __________________________
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Which of Newton’s Laws is demonstrated? ________________________________________________
16. What is acceleration due to gravity? (include the units) ____________________
17. What does the law of universal gravitation basically say? _______________________________________
18. If I have more mass, will exert more or less gravity on another object? __________________
19. If two objects are close together, will they exert more or less gravity on each other? _______________
20. What is the difference between mass and weight? ____________________________________________
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21. Are kilograms the units for mass or weight? ____________ What is the SI unit for weight? ____________
22. Explain why the pilot of a plane must have precise measurements of velocity.
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23. You are riding on a train going north and you see a car traveling north parallel to the train. Yet the car
seems to be going backward. Explain this occurrence.
________________________________________________________________________________________
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Use the following formulas to solve the practice problems:
a = (vf – vi ) / t
s=d/t
d = ½ a t2
F=ma
1. A student practicing for a track meet ran 240 m in 30 sec.
a. What was her average speed?
b. If on the following day she ran 300 m in 30 sec, by how much did her speed increase?
2. A car traveled 1025 km from Chicago to New Orleans in 13.5 hrs. What was its average velocity?
3. How fast was a plane flying if it traveled 400 km in 30 min?
4. A student walks 10 blocks to a computer store (Assume all the blocks are equal length.)
a. How long will it take him to reach the computer store if he walks 3 blocks in 2 min?
b. What is his average velocity?
5. If the average speed a car is 45 km/hr, how far can it travel in 2 hours?
6. A driver starts his parked car and within 5 sec reaches a velocity of 54 km/hr as he travels east. What is his
acceleration?
7. Falling objects drop with an average acceleration of 9.8 m/sec/sec/ or 9.8 m/sec 2. If an object falls from a tall
building, how long will it take before it reaches a speed of 49 m/sec?
8. What is the force of gravity acting on a 40-kg object?
Challenge: If the average speed a car is 45 km/hr, how far can it travel in 45 min?