Energy Forms and Changes
When a ball is tossed in the air, what kind of energy does it have at its very highest point, right before it starts to fall?
Potential Energy
What is the name of the force that causes a rolling basketball to eventually stop, even if it doesn't hit anything
Friction
This law explains why you need to wear a seatbelt; your body wants to keep moving forward even when the car stops
Newton's 1st Law of Motion
What is a force that causes a change in an object's motion?
An unbalanced force
When a soccer ball or a rolling marble is moving, what kind of energy does it have?
Kinetic Energy
This force acts at a distance and is the reason a leaf falls to the ground instead of floating away
Gravity
A professional Football player kicks a foot ball and it moves 60 yards, but a WMS 6th grader kicks the ball and it only move 20 yards. The greater force applied by the professional caused the ball to _________ more
Accelerate
The total of all forces acting on an object is called __________
The Net Force
A rolling marble seems to lose energy as it moves across a ramp. This is because friction converts some of its kinetic energy into this.
Heat (Thermal) Energy
What is the scientific unit used to measure force?
Newton (N)
According to Newton's Second Law, it takes more force to accelerate a bowling ball than a tennis ball because the bowling ball has more _________
Mass
If two teams in a tug-of-war pull with the exact same amount of force, what will happen to the rope?
It won't move
Describe the main energy change as a leaf falls from a high branch: It starts with mostly ___________ energy which changes into mostly___________ energy as it falls
Potential; Kinetic
The electrical force that can make your hair stand up after rubbing it with a balloon is an example of a ___________ force.
Non-Contact Force
A rocket ship in space runs out of fuel but keeps moving at a constant speed. This is because of the object's _________
Inertia
A person pushes a ball with a force of 85 N left and the force of friction is 10 N to the right. What is the net force?
75 N to the left
What is the law that states energy cannot be created or destroyed, only changed from one form to another?
The Law of Conservation of Energy
To produce the greatest increase in gravitational force between two objects in space, you should double this property of both objects
Their Mass
A swimmer pushes backward on a raft, and the raft moves in the opposite direction. This is a perfect example of which of Newton's Laws?
The 3rd Law
An object at rest will stay at rest if the forces acting on it are _________
Balanced