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- 1. Multiple ChoiceA free falling objects falls under the influence offorce of airforce of gravityforce of resistanceforce of
- 2. Multiple ChoiceDo free falling objects move at constant velocity or do they accelerate?Falling objects accelerate at -9.8 m/s2Falling object move at constant velocityFalling objects accelerate at 100 m/s2It depends on the mass: heavy objects accelerate, light objects do not
- 3. Multiple Choice
What values are always known for an object that is dropped?
vi = 0 m/s
a = -9.8 m/s2
vi = -9.8 m/s
a = -9.8 m/s2
vi = -9.8 m/s
a = 0 m/s2
d = -9.8 m
vi = 0 m/s
- 4. Multiple Choice
A free falling object falls for 2.4 s. What is its displacement? Use equation #3
-28.2 m
-11.76 m
-56.45 m
-9.8 m
- 5. Multiple ChoiceA free falling object falls for 1.6 s. What is the final velocity?-15.68 m/s- 9.8 m/s- 6.125 m/s- 25.088 m/s
- 6. Multiple Choice
The acceleration due to gravity near the surface of Earth is equal to
9.8 m/s
-9.8 kg x m/s
-9.8 N
-9.8 m/s2
- 7. Multiple Choice
How fast will a brick be going after it falls for 2.5 seconds?
24.5
28.5
19.8
9.8
- 8. Multiple Choice
An apple falls out of a tree and takes 1.75 seconds to strike the ground. How high was the apple from the ground?
25.00
20.00
15.00
10.00
- 9. Multiple Choice
A rock is thrown out of a volcano. When it started to fall, it took 9.5 seconds to hit the ground. How fast was the rock traveling as it struck the ground?
9.8
93.1
98.1
9.3
- 10. Multiple Choice
A plane is flying a 9000 m when one bolt works its way loose and falls to the ground. How long did it take to hit the ground?
55.0
49.2
45.9
42.9
- 11. Multiple Choice
An object in free fall has a ____ acceleration.
constant
increasing
decreasing
zero
- 12. Multiple Choice
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would beless than the speed it had when thrown upwards.more than the speed it had when thrown upwards.the same as the speed it had when thrown upwards. - 13. Multiple ChoiceIf you throw a baseball straight up, what is its velocity at the highest point?9.8 m/s29.8 m/s4.5 m/s20 m/s
- 14. Multiple ChoiceWhich would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?the featherthe metal boltThey would hit the ground at the same time.They would be suspended in a vacuum.
- 15. Multiple ChoiceWhich would fall with greater acceleration in a vacuum—a leaf or a stone?the leafthe stoneThey would accelerate at the same rate.It is difficult to determine without more information.
- 16. Multiple ChoiceThe more mass an object has, the faster it will fall.TrueFalse
- 17. Multiple ChoiceIf I throw a crayon straight up at 12m/s, how fast is its speed when i catch it at the same height?-6 m/s-12 m/s-18 m/s-24 m/s
- Answer choicesTagsAnswer choicesTags