change in an object's position
What is a push or a pull?
force
If you drop a dime and a quarter from the same height which will hit the ground first?
neither they will hit at the same time
Velocity is described as an object's _____ and ____.
speed and direction
What is the force that pulls objects down?
gravity
Energy is the ability to do _____.
work
Which has more kinetic energy a fastball thrown by a pro pitcher or an underhanded pitch thrown by the PE teacher?
Fastball by pro pitcher
The solid cylinder has a greater mass. Which object will roll the farthest?
solid cylinder
What is how fast an object's position changes over time?
speed
What are three things a force can cause an object to do?
change its speed, change its direction, move, stop
Is it accelerating or not accelerating? Why?
a racer at the starting line
not accelerating
because they aren't moving
What is a change in velocity over time?
acceleration
What two factors affect the acceleration of an object?
mass or weight and using a greater force
speed or mass/weight
Is it accelerating or not accelerating? Why?
a race car going around a curve
accelerating
because it is changing direction
Does an object have more energy when it is moving slow or fast?
fast
If you were pulling the objects below, what would you have to do to move both objects the same distance?
Object 1 Object 2
use more force to pull object 2
When you compress a spring what type of energy does it have?
potential energy
At which point on a roller coaster would the kinetic energy be the highest?
At the bottom of the hill.
If you roll an object down a 6 ft high ramp and the same object down a 3 ft high ramp, which object will have the greater speed and why?
The object that went down the 6 ft ramp because it was higher.