Define kinetic energy
energy in motion
What do m, v, and h represent in a formula?
Mass, velocity, and height
Describe the area of lowest kinetic energy on a rollercoaster.
At the top of the highest point.
Which of the following most influences potential energy?
A. Mass
B. Height
C. Velocity
D. Volume
B. Height
Define potential energy
energy that is stored or waiting to be used.
What is the formula for potential energy?
PE = mgh
When analyzing a pendulum, is kinetic energy highest on an end, or in the swing, and why?
In the swing, where speed is highest.
When analyzing a pendulum, is potential energy highest on an end, or in the swing, and why?
On either end (if heights are equal) because the ends represent the greatest height.
Define gravitational potential energy
stored energy due to position
What is the formula for kinetic energy?
1/2mv2
Kinetic energy is most influenced by:
A. Height
B. Mass
C. Speed
D. Gravity
C. Speed
List two examples of chemical energy, and two examples of elastic energy.
Chemical: batteries, food, gasoline, natural gas
Elastic: springs, rubber bands, slingshots
Define chemical energy
stored energy from chemical substances
In the formula for kinetic energy, which is halved?
A. Mass
B. Velocity
C. Both
A. Mass
A professional baseball player hits a home run at the end of the ninth inning. The ball's maximum speed reaches 100 mph. At what point does the ball likely have the most kinetic energy?
A. In the pitcher’s hand.
B. Just after it’s hit by the bat.
C. As it drops to the ground.
D. When it lands.
B. Just after it's hit by the bat.
Consider a graph. If potential energy is on the Y axis, and height is on the X axis, what type of slope will be observed, and why?
A. Positive incline
B. Negative incline
C. Straight, Horizontal slope
D. A parabola
A. Positive incline because PE and height have a direct relationship; as height increases, so will PE.
Define elastic energy
stored energy due to stretching or compression
In the formula for potential energy, what is the numerical representation of gravity?
9.8
A 5 kg object is moving 20 m/s. Calculate kinetic energy.
1000 J
Calculate potential energy if mass is 10kg and height is 5m.
490 J