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15 questions
When the only force on an object is gravity:
free fall
acceleration
gravity
range
An object in free fall is also called
gravity
projectile motion
projectile
tide
Objects will accelerate towards Earth at a rate of
1.6 m/s^{2}
9.8 m/s^{2}
9.8 N
1.6 N
What is the direction of the acceleration for any projectile?
The direction the projectile is traveling.
Down
Up
Sideways
If a projectile is launched with an initial vertical velocity (Voy) of 60 m/s, how long will it take to reach its highest point?
5 seconds
6 seconds
7 seconds
7.5 seconds
A plane flying horizontally at 120 m/s drops a crate. When the crate strikes the ground 15 seconds later, what is the magnitude of the horizontal component of its velocity?
147 m/s
120 m/s
1800 m/s
8 m/s
At which of the following places does a projectile have the least velocity?
At the peak of its trajectory
Half way to the peak
At the instant it is launched
All points have the same velocity
At which of the following places does a projectile have the greatest acceleration?
At the peak of its trajectory
Half way to the peak
At the instant it is launched
All points have the same acceleration
The acceleration during the whole trip, on the horizontal component, is always...
0 m/s^{2}
3.6 m/s^{2}
5 m/s^{2}
-9.8 m/s^{2}
The final velocity on the highest point is...
2.1 m/s
positive
0 m/s
negative
If the time to get to the highest point is 2.6 s, what would be the total time in the air?
2.6 s
3.8 s
5.2 s
4.9 s
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