Understanding Freefall
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When an object is thrown up from the ground and it lands back on the ground, its final velocity will be
- zero
- positive
- negative
An object is dropped from a 15 m cliff. What is its Δy?
- negative
- -15 m
- 0 m
- positive
- 15 m
If an object is thrown up from a cliff and lands on the ground below, how does the final and initial velocities compare?
- Vf = Vi
- Vf is negative and faster than Vi
- opposite
- Vf = -Vi
- Vf = 0 m/s
- Vf is negative and slower than Vi
When an object is dropped its final velocity is
- negative
- positive
- zero
At the top of its trajectory (top of its path), the object's velocity is
- negative
- positive
- zero
If an object is thrown up from the ground and lands back on the ground, how do the final and initial velocities compare?
- opposite
- Vf = -Vi
- Vf = 0 m/s
- Vf = negative
- Vf = Vi
When an object is thrown up the ground its initial velocity is
- positive
- negative
- zero
An object is thrown up into the air. Δy =
- positive
- zero
- negative
If Vi is positive, Vf = 0 m/s, a = -9.8 m/s2, what are you finding?
- How far in the x direction it goes.
- How fast it will be going.
- How much time it will take to go to the top.
- How high up it goes.
How high does a thrown object go?
In order to solve this problem you need to know that Vf = ?
- Vf = 0 m/s
- Vf = negative
- Vf = positive
- not enough information
If an object is thrown up from the ground and it lands back the ground Δy =
- zero
- positive
- negative
What is the acceleration of an object that is thrown up or dropped?
- ay = -9.8 m/s2
- not enough information given.
- ay = 0 m/s2
When an object is dropped its initial velocity is
- negative
- zero
- positive