Name______Class______Date______
Assessment
Unit Study Guide- Force and Motion
Matter in Motion
Matching
Match the correct definition with the correct term. Write the letter in the space provided. Some terms will not be used.
_____1.a push or a pull that always acts on an object
_____2.a change in a moving object’s speed or direction
_____3.a force that always acts to oppose motion
_____4.a measure that does not change when an object’s location changes
_____5.the measure of gravitational force exerted on an object
_____6.speed of an object in a particular direction
_____7.the force of attraction between objects
Multiple Choice
Write the letter of the correct answer in the space provided.
_____8.What is an object that appears to stay in place and that helps you detect motion in another object?
a.a newton
b.a lubricant
c.a black hole
d.a reference point
_____9.Which is an example of friction that is helpful?
a.car engine parts wearing out
b.tires moving a car forward
c.holes developing in your socks
d.the erosion of soil by wind
_____ 10. To calculate an object’s average acceleration, you need to know
a.starting velocity, distance traveled, and speed.
b.starting point, endpoint, and the object’s mass.
c.starting velocity, final velocity, and time it takes to change velocity.
d.average speed, distance, and the time it takes to change velocity.
Chapter Test A continued
Write the letter of the correct answer in the space provided.
_____ 11. The gravitational pull is greater between two objects that
a.have greater masses.
b.have rougher surfaces.
c.are farther apart.
d.are moving at greater speed.
_____ 12. What is the net force on an object when you combine a force of 10 N north with a force of 5 N south?
a.5 N south
b.15 N north
c.50 N north
d.5 N north
_____ 13. Mass is
a.different on the moon than on Earth.
b.a measure of gravitational force.
c.a measure of the amount of matter.
d.measured in newtons.
_____ 14. Dividing the total distance traveled by the total time is how to calculate
a.average speed.
b.average velocity.
c.average acceleration.
d.average motion.
_____ 15. The difference between speed and velocity is that
a.velocity involves time, while speed does not.
b.speed involves time, while velocity does not.
c.velocity has direction, while speed does not.
d.speed has direction, while velocity does not.
_____ 16. To produce change in motion, a force must be a(n)
a.balanced force.
b.unbalanced force.
c.frictional force.
d.gravitational force.
_____ 17. When a mover puts furniture on wheels, which type of friction is the mover using to make the job easier?
a.static friction
b.sliding kinetic friction
c.rolling kinetic friction
d.gravitational friction
Chapter Test A continued
Write the letter of the correct answer in the space provided.
_____ 18. Friction occurs because of
a.the roughness of any object’s surface.
b.only the weights of any two objects.
c.only the masses of any two objects.
d.unbalanced forces.
_____ 19. A hiker’s velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration?
a.The direction changed.
b.The direction was unchanged.
c.The speed increased.
d.The speed decreased.
_____ 20. In which of the following is a skater NOT accelerating?
a.going straight while speeding up
b.going straight at constant speed
c.making circles at constant speed
d.going straight while slowing down
_____ 21. If a student has a weight of 420 N on Earth, what is the student’s weight on the moon? (Moon’s gravity = 1/6 of Earth’s gravity)
a.70 N
b.2520 N
c.70 kg
d.2520 kg
_____ 22. An unbalanced force can cause an object’s motion to change by
a.changing direction or speed; starting but not stopping motion.
b.changing direction or speed, starting or stopping motion.
c.changing direction or speed; stopping but not starting motion.
d.changing direction or speed only.
_____ 23. The law of universal gravitation says that gravitational force is
a.related to mass and distance.
b.related to weight and distance.
c.related to mass and friction.
d.related to weight and friction.
Chapter Test A continued
Use the graph below to answer question 24. Write the letter of the correct answer in the space provided.
_____ 24. Graph A shows distance traveled during a bicycle race. Because the upward slope on Graph A is straight and objects do not normally travel at a constant rate, what does it MOST likely represent?
a.average acceleration c. average speed
b.actual acceleration d. actual speed
Use the graph below to answer question 25. Write the letter of the correct answer in the space provided.
_____ 25. Graph B is a graph of a roller coaster car moving up a hill. What does the straight upward slope on Graph B show?
a.positive velocity c. positive acceleration
b.negative velocity d. negative acceleration
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Holt Science and technology1Matter in Motion