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Grade 9 Energy and Momentum
The total amount of kinetic and potential energy in a system is called
1. chemical energy.
2. mechanical energy.
4. thermal energy.
Grade 9 Forces and Motion
Grade 9 Forces and Motion
The amount of air resistance depends on the speed of a falling object and
1. the mass of the object
2. gravitational pull of the Earth
3. the time of day the object is falling
4. amount of surface area of the object
Grade 9 Forces and Motion
Grade 9 Forces and Motion
Based on the data in the table, which of the following statements can be true about the object being measured?
1. A net force is being applied in a direction opposite to its velocity
2. The object has an acceleration of -2 m/s/s
3. The graph of this object would be a straight line
4. All of the above
Grade 9 Forces and Motion
Which of the following is an example of a pulling force?
1. dragging a dog sled
2. throwing a baseball
3. hitting a golf ball
4. slamming the car door
Grade 9 Forces and Motion
Grade 9 Energy and Momentum
Grade 9 Forces and Motion
Grade 9 Forces and Motion
Newton's Second Law of Motion explains the relationship between
1. mass, force, and velocity
2. mass, force, and acceleration
3. mass, acceleration, and static force
4. velocity, force, and air resistance
Grade 9 Forces and Motion
Newton's Third Law gets help from the first two laws. Which aspects from those laws are necessary to help explain Newton's Third Law of Motion? (Check off all answers that apply)
1. An object in motion tends to stay in motion
2. An object at rest tends to stay at rest
3. Force equals mass times acceleration
4. The greater the mass is, the greater the force necessary to accelerate that mass is
5. The acceleration of an object is parallel and directly proportional to the force created
6. For every action, there is an equal and opposite reaction
7. Apples hurt when they land on your head
Grade 9 Forces and Motion
The weight of an object
1. stays the same wherever the object is
2. changes if the object is in motion
3. stays the same as long as the object is in motion
4. changes if the force of gravity changes
Grade 9 Forces and Motion
Grade 9 Energy and Momentum
An example of an object having elastic potential energy is
1. a stretched spring
2. books on a shelf
3. a moving arrow
4. a falling oyster
Grade 9 Forces and Motion
Horizontal lines on a velocity/time graph show
1. constant acceleration
2. no motion
3. positive acceleration
4. negative acceleration
Grade 9 Fluid Mechanics
Grade 9 Forces and Motion
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