Law of Conservation of Energy
Measuring and Graphing Speed
Types of Forces
Law of Gravity
Unbalanced Forces
100
Which of the following is an example of potential energy? A. the energy a baseball has because of its motion B. the energy a spring has by being compressed C. the energy an object gains by increasing its temperature D. the energy of an electromagnetic wave
B. the energy a spring has by being compressed
100
A cyclist travels 32 km in 2 hours. What is the cyclist's average speed? A. 16 km/hr B. 32 km/hr C. 34 km/hr D. 64 km/hr
A. 16 km/hr
100
Luis rubbed a balloon on his hair and held the balloon next to the wall. He observed the balloon stick to the wall. Which of the following is responsible for the balloon sticking to the wall? A. gravity B. friction C. electric force D. magnetic force
C. electric force
100
A spacecraft orbiting Earth moves to an orbit that is half as far from the center of Earth. How does the gravitational force between the spacecraft and Earth change? A. The gravitational force decreases. B. The gravitational force remains unchanged. C. The gravitational force increases. D. The gravitational force has effect only on Earth's surface.
C. The gravitational force increases.
100
What is a net force? A. a push or pull B. the amount of energy an object has C. the combination of all forces acting on an object D. a measure of how fast an object is moving
C. the combination of all forces acting on an object
200
How does an object's kinetic energy change if its speed doubles? A. Its kinetic energy quadruples. B. Its kinetic energy doubles. C. Its kinetic energy remains the same. D. It kinetic energy is halved.
A. Its kinetic energy quadruples.
200
A falling ball accelerates from 5 m/s to 25 m/s in 2 seconds. What is the ball's average acceleration? A. 20 m/s/s B. 10 m/s/s C. 30 m/s/s D. 40 m/s/s
B. 10 m/s/s
200
Which of the following terms best describes why a skier sliding down a hill eventually comes to a stop? A. acceleration B. inertia C. gravity D. friction
D. friction
200
What happens to the gravitational force between two objects when their masses are increased?
When mass increases, the gravitational force increases.
200
You exert a force of 130 N to push a box down the hallway. Your friend helps by exerting a force of 160 N against the box in the same direction. Which net force do you and your friend exert on the box? A. 30 N B. 130 N C. 290 N D. 160 N
C. 290 N
300
What does the Law of Conservation of Energy state?
Energy cannot be created nor destroyed, it can only be transformed from one form to another.
300
If you know the distance an object has traveled in a certain period of time, you can determine the A. size of the object B. the location of the object C. the speed of the object D. the mass of the object
C. the speed of the object
300
Gordon is making a list of forces for his science class. Which of the following should Gordon NOT list as a force? A. gravity B. friction C. a push or pull D. mass
D. mass
300
The force of gravity decreases as which of the following increases? A. distance B. volume C. weight D. mass
A. distance
300
According to Newton's Second Law of Motion, an object's acceleration depends on the force applied to it and its A. velocity B. position C. length D. mass
D. mass
400
Why is a kite flying in the sky an example of potential energy? A. The kite is high above the ground. B. The kite is constantly moving. C. The kite is being pulled by a string. D. The kite is being pushed by winds.
A. The kite is high above the ground.
400
Acceleration is defined as A. the rate at which an object is moving at a given instant in time B. the rate at which an object's velocity changes C. an object's speed in a given direction D. the distance an object moves
B. the rate at which an object's velocity changes
400
Which of the following types of forces is a contact force? A. magnetic force B. gravitational force C. friction force D. electrical force
C. friction
400
What would cause the gravity on the surface of Mars to be greater than the gravity on the surface of the moon? A. Mars is more massive than the moon. B. Mars is solid and the moon is not. C. Mars is farther away from the sun than to moon. D. Mars is farther away from the Earth than the moon.
A. Mars is more massive than the moon.
400
Which of the following is a true statement about action-reaction forces? A. They are equal and cancel each other B. They act on different objects C. Both act at a distance D. They act only when there is no friction
B. They act on different objects.
500
Which is an example of potential energy being transformed into kinetic energy? A. A rock sitting at the top of a hill rolling down the hill. B. a rock sitting at the top of a hill without moving. C. a rock at the bottom of a hill being pushed up the hill D. a rock sitting at the bottom of a hill without moving.
A. a rock sitting at the top of a hill rolling down the hill
500
How do you graph motion?
You can show the motion of an object on a line graph in which you plot distance vs time. Time is shown on the x-axis and distance is shown on the y-axis. Each point on the line represents the distance an object has traveled during a particular time.
500
What are the two main types of forces?
Contact forces and forces acting at a distance (non-contact)
500
What does the Law of Universal Gravitation state?
The force of gravity acts between all objects in the universe that has mass. Any two objects in the universe that have mass attract each other.
500
According to Newton's Second Law of Motion, a force of 120 N applied to a 20-kg rock would result in an acceleration of A. 6 m/s/s B. 2400 m/s/s C. 100 m/s/s D. 60 m/s/s
A. 6 m/s/s
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