Download Name: Date: Aim 18: Kinetic and Potential Energy Diagrams 1. 2. b

Name:
Date:
Aim 18: Kinetic and Potential Energy Diagrams
1.
a) What force makes the balls fall towards the pavement? _______________
b) Which ball has the greatest kinetic energy? Explain why
c) Which ball has the least kinetic energy? Explain why
d) Which ball will hit the ground first? 2.
a) If the mass of the pendulum was increased and it was released from the same
height as before, would you expect the pendulum to remain swinging for a
longer time? Explain why
b) Eventually the pendulum will come to a rest having lost it's energy. Where did this energy go?
c) Explain the changes in potential and kinetic energy as the pendulum swings back and forth.
d) If the string was snipped and the ball fell freely toward Earth, what will happen to the
KE? ___________________________ PE? ___________________________
3.
Which particle below has the greatest kinetic energy?
a. a 1 gram particle moving at 50 m/s
b. a 1 gram particle moving at 100 m/s
c. a 1 gram particle moving at 400 m/s
4. The diagram below represents a planet in orbit around a star. Which statement best describes how the planet's energy is
changing as it moves from point A to point B?
a. Kinetic energy is increasing and potential energy is decreasing.
b. Kinetic energy is decreasing and potential energy is increasing.
c. Both kinetic and potential energy are decreasing.
d. Both kinetic and potential energy are increasing.
5.
As the pendulum swings from position A to position B as shown in the diagram above,
which occurs?
a. The kinetic energy decrease is more than the potential energy increase.
b. The kinetic energy increase is more than the potential energy decrease.
c. The kinetic energy decrease is equal to the potential energy increase.
d. The kinetic energy increase is equal to the potential energy decrease.
6. Base your answer to the following question on the diagram below. A model rocket was launched from point A and
landed at point E. Assume that no force other than the rocket engine and gravity affects the rocket immediately after the
launch.
Explain how the chemical potential energy of the rocket engine is changed into kinetic and
potential energy as the rocket rises to point C 7. Object A is moving over a frictionless surface from point A to E.
a) The object's kinetic energy at point C is
a. decreasing
b. increasing
c. remains the same
b) The object will have a minimum gravitational
potential energy at point
a. A
b. B
c. C
d. D
8. A ball is thrown upward from the Earth's surface. While the ball is rising, its gravitational potential energy will
a. decrease
b. increase
c. remain the same
9. Below is a simple pendulum with a 2.0-kilogram bob and a length of 10. meters. The pendulum is released from rest at
position 1 and swings without friction through position 4.
a) At which position does the bob have its maximum
kinetic energy?
Circle Answer: 1, 2, 3 or 4
b) In which position does the pendulum have the greatest
potential energy?
Circle Answer: 1, 2, 3 or 4
10.
a) Assuming that the rock falls steadily down the cliff, at
what point would it have the maximum kinetic energy?
Circle Answer: A, B, C or D
c) At which point in the diagram is potential energy the
greatest?
Circle Answer: A, B, C or D
11.
a) The gravitational potential energy of the 2.0-kilogram
mass is greatest at
Circle Answer: A, B, C, E or F
b) The gravitational potential energy of the 2.0-kilogram
mass is the least at
Circle Answer: A, B, C, E or F