TEST PLZ HELP FAST 1. Which would fall with greater acceleration in a VACUUM, a leaf or a stone? *
The leaf
The stone
They would accelerate at same rate
It is difficult to determine without more information

2. You drop two balls, one of mass 10 kg and one mass of 20 kg. Which ball hits the ground first? *
The 10 kg ball
The 20 kg ball
They hit the ground at the same time
There is not enough information

3. A toy rocket is launched into the air from the ground at 21 m/s. It travels 22 meters into the air and then stops and comes back to its launch pad. What is the toy rocket's speed as it is hitting the launchpad? *
0 m/s
21 m/s
9.81 m/s
Not enough information to solve.
For questions 4 & 5: A rock from a volcanic eruption is launched straight up into the air with no air resistance.

4. Which one of the following statements is TRUE for the acceleration and velocity of the rock at its highest point?
Acceleration is 0 and velocity is 0.
Acceleration is downward and velocity is at its maxiumum.
Acceleration is upward and velocity is at its maximum.
Acceleration is downward and velocity is 0.
Acceleration is upward and velocity is 0.

5. Which of the following statements is TRUE about the velocity and acceleration of the rock while it is MOVING upward?
Velocity is increasing and acceleration is constant.
Velocity is decreasing and acceleration is constant.
Velocity is increasing and acceleration is increasing.
Velocity is decreasing and acceleration is decreasing.