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Kinetic and Potential Energy
Motion and Speed
Forces
Gravity and Motion
100
When a force causes an object to move in the direction of the force, this is accomplished.
What is work? work = force x distance
100
A quantity that has both size and direction.
What is a vector?
100
Force, a vector having size and direction, is measured in this unit.
What is a Newton?
100
A gravitational pull exists between any two objects that have this.
What is mass?
200
This is the unit we use to measure energy and work.
What is a joule? 1 Joule = 1 Newton x 1 Meter
200
A man walked 80 miles in 4 days to achieve this average speed.
What is 20 miles per day?
200
The tendency to resist change in motion. Another name for Newton's 1st law of motion.
What is inertia?
200
These two factors affect gravitational force.
What are mass and distance?
300
All objects in motion have kinetic energy. The amount of kinetic energy a moving object possesses depends on these two factors.
What are mass and speed?
300
The standard unit of length.
What is a meter?
300
4 kids are playing tug-of-war. 2 kids are pulling left at 90 N, and 2 kids are pulling right at 120 N. The net force is ___.
What is 30 N to the right?
300
An elliptical path one object takes around another object.
What is an orbit?
400
Many objects have both kinetic and potential energy. For example, an airplane in flight has kinetic energy due to its movement, and potential energy because of its mass and distance from the Earth. The combination of potential and kinetic energy creates this form of energy.
What is mechanical? Mechanical Energy exists in a closed system. Mechanical Energy = Potential Energy + Kinetic Energy Only friction can drain energy from this system. In the presence of friction, mechanical energy is converted into thermal energy.
400
A green car and blue car were racing. When their speed was put on a graph, the green car's speed was represented by a steep line, and the blue car's speed was a flatter line. Which car had a faster speed?
What is the green car?
400
Two common forces. One is a contact force that involves two objects rubbing together. The other acts at a distance and pulls objects down.
What are friction and gravity?
400
The measure of the force of gravity between Earth and any given object
What is weight?
500
This law states that energy cannot be created or destroyed, but can only be transformed into other forms of energy.
What is the Law of Conservation of Energy?
500
A track sprinter ran a 100m race 3 times. His times were 15 seconds, 17 seconds, and 18 seconds. What was his average speed?
What is 6 m/s?
500
The formula for calculating force. Newton's 2nd law of motion.
What is Mass x Acceleration?
500
A spacecraft and its contents in orbit are in this state. There is no outside force acting on it apart from gravity.
What is free fall?