Unit 6 Review: Question Preview (ID: 14516)

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Which form of energy increases as an apple falls from a tree?
a) kinetic energy b) electrical energy c) thermal energy d) potential energy
Which of the following is the best example of potential energy?
a) stretched rubberband b) ball bouncing c) baby crawling d) fish swimming
Changes in the motion of an object is determined by ---
a) its density b) the size and direction of the forces acting on it c) the renewable resources available d) its chemical properties
The amount of kinetic energy that an object contains depends on ---
a) mass and speed b) mass and length c) position and height d) mass and height
A cat sitting on top of a refrigerator has what kind of energy?
a) thermal b) potential c) mechanical d) kinetic
Which of the following statements best describes what happens when you use a simple machine?
a) less force will be needed to move a box with an inclined plane b) less force will be needed to move a box without an inclined plane c) It will take the same amount of force to move both boxes. d) none of the above
Which cube will move as a result of a force of 20 N to the left?
a) Cube C is 30 N to the left and 30 N to the right b) Cube B 30 N to the left and 10 N to the right c) Cube A is 50 N to the right and 40 N to the right d) none of the above
What is the average speed of an object that goes 30 cm in 30 seconds?
a) 1 cm/s b) 30 cm/s c) 60 cm/s d) none of the above
If the line on a graph goes horizontal, what is happening?
a) the object is speeding up b) the object is slowing down c) the object is stopped d) none of the above
At which point does the roller coaster have the most kinetic energy?
a) top of the highest hill b) bottom of the highest hill c) bottom of the smallest hill d) none of the above
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