Understanding Freefall

When an object is thrown up the ground its initial velocity is
1. positive
2. negative
3. zero
When an object is dropped its initial velocity is
1. positive
2. negative
3. zero
At the top of its trajectory (top of its path), the object's velocity is
1. positive
2. negative
3. zero
If an object is thrown up from the ground and it lands back the ground Δy =
1. positive
2. negative
3. zero
If an object is thrown up from the ground and lands back on the ground, how do the final and initial velocities compare?
1. Vf = Vi
2. Vf = -Vi
3. opposite
4. Vf = 0 m/s
5. Vf = negative
What is the acceleration of an object that is thrown up or dropped?
1. not enough information given.
2. a_y = 0 m/s²
3. a_y = -9.8 m/s²
An object is dropped from a 15 m cliff. What is its Δy?
1. negative
2. positive
3. -15 m
4. 15 m
5. 0 m
How high does a thrown object go?

In order to solve this problem you need to know that V_f = ?
1. Vf = 0 m/s
2. Vf = positive
3. Vf = negative
4. not enough information
When an object is thrown up from the ground and it lands back on the ground, its final velocity will be
1. positive
2. negative
3. zero
When an object is dropped its final velocity is
1. positive
2. negative
3. zero
An object is thrown up into the air. Δy =
1. positive
2. negative
3. zero
If an object is thrown up from a cliff and lands on the ground below, how does the final and initial velocities compare?
1. Vf = Vi
2. Vf = -Vi
3. opposite
4. Vf = 0 m/s
5. Vf is negative and faster than Vi
6. Vf is negative and slower than Vi
If V_i is positive, V_f = 0 m/s, a = -9.8 m/s², what are you finding?
1. How far in the x direction it goes.
2. How much time it will take to go to the top.
3. How fast it will be going.
4. How high up it goes.