Potential and Kinetic Energy
At which point of a pendulum’s swing is potential energy the greatest?
✅ Answer: At the highest points of the swing
When an electric mixer is plugged in and starts spinning, what energy transformation occurs?
Electrical energy → mechanical energy
Which heat transfer process causes warm air to rise and cool air to sink?
Convection
Which type of graph shows positive acceleration?
A graph where speed increases over time. (Diagonal line going up)
What is Newton’s First Law of Motion also called?
What is the Law of Inertia?
What happens to kinetic energy as an object’s speed increases?
✅ Answer: Kinetic energy increases
Tonya’s house uses solar panels to power her appliances. When she uses the oven to bake cookies, which sequence of energy transformations occurs?
A. heat energy → light energy → heat energy
B. light energy → electrical energy → heat energy
C. heat energy → chemical energy → light energy
D. light energy → electrical energy → chemical energy
Light energy → electrical energy → heat energy
Why does a hot air balloon rise when the burner flame increases?
Heated air rises through convection
A car is moving in a straight line and its speed increases each second. How is the car’s motion best described?
A. Moving at constant speed
B. Not moving
C. Accelerating
D. Slowing down
C. Accelerating
If the forces acting on an object are balanced, how will the object move?
remain at rest or move at a constant speed
A ball is dropped from a higher height. How does this affect its kinetic energy when it hits the ground?
✅ Answer: It has greater kinetic energy
Turning on a lamp is an example of which transformation?
Electrical energy → light energy
When a door opens between a warm room and a cold room, what happens over time?
The temperatures become equal
What does a straight line on a distance-time graph represent?
Constant speed
Two forces pull on a box. The force pulling to the left is greater than the force pulling to the right. How will the box move?
move to the left
Which factor affects gravitational potential energy? A) color
B) shape
C) height
D) speed
✅ Answer: Height
Which statement about energy is TRUE?
A) Energy can be destroyed
B) Energy can only be heat
C) Energy can be transformed
D) Energy disappears after use
✅ Answer: Energy can be transformed
Which process transfers heat through direct contact?
Conduction
Which motion describes acceleration?
A change in speed or direction
Two boxes accelerate at the same rate, but Box A requires less force than Box B. Which box has the smaller mass, and why?
Box A, because lighter objects require less force to accelerate at the same rate
When a marble is released from a slingshot, which energy transformation occurs?
✅ Answer: Potential energy → kinetic energy
Jolene uses many forms of energy to get ready for school in the morning. Jolene turns on her lamp,makes toast while listening to the radio, she plugs in her coffee pot to make a latte before hopping on her bike and heading to class. Which forms of energy are used during Jolene’s morning routine?
✅ Light, heat, sound, electrical, mechanical
A metal spoon is placed in a cup of hot soup. After several minutes, the handle of the spoon becomes hot to the touch. Which process best explains how thermal energy moved through the spoon?
Conduction ✅
The distance–time graph of an object shows a horizontal line over a period of time. What does this tell you about the object’s motion during that interval?
A. The object is accelerating
B. The object is slowing down
C. The object is not moving
D. The object is moving at a constant speed
C. The object is not moving
A student investigates balloon rockets. One balloon has pennies added, and two balloons are released in opposite directions at the same time. What relationship are these investigations testing?
What is that motion depends on an object’s mass and the forces acting on it?