Matter In Motion Test
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Quiz to assess force and motion knowledge, as learned through the "Matter in Motion" lab.
- 1.Friction is a force that
- A.
Opposes an object's motion.
- B.
Does not exist when surfaces are very smooth.
- C.
Decreases with larger mass.
- D.
All of the above.
- 2.Rolling friction
- A.
Is usually less than sliding friction.
- B.
Makes it difficult to move objects on wheels.
- C.
Is usually greater than sliding friction.
- D.
Is the same as fluid friction.
- 3.A force
- A.
Is expressed in newtons.
- B.
Can cause an object to speed up, slow down, or change direction.
- C.
Is a push or a pull.
- D.
All of the above.
- 4.Which type of friction causes a sky diver's acceleration to change as she falls?
- A.
Sliding
- B.
Rolling
- C.
Fluid
- D.
Static
- 5.Two forces act on an object. One force has a magnitude of 10N and is directed toward the north. The other has a magnitude of 5N directed toward the south. The object experiences a net force of
- A.
5 N south
- B.
15 N north
- C.
50 N north
- D.
5 N north
- 6.A reference point for determining position and motion could be
- A.
The Earth's surface.
- B.
A building.
- C.
A moving object.
- D.
All of the above.
- 7.The distance traveled divided by the time it took to travel that distance determines an object's
- A.
Speed.
- B.
Acceleration.
- C.
Weight.
- D.
Force.
- 8.You are in Chicago, IL. You decide to head south to Austin, TX. In one hour, you travel 80 km. Your velocity is
- A.
80:1
- B.
80 km
- C.
80 km/h
- D.
80 km/h south
- 9.A car traveling 20 m/s south enters a new highway going east at 20 m/s. The car has
- A.
Decreased its distance.
- B.
Changed its speed.
- C.
Accelerated.
- D.
Not changed its velocity.
- 10.Acceleration is a change in
- A.
Speed.
- B.
Velocity.
- C.
Direction.
- D.
All of the above.
- 11.When velocity decreases, this could be referred to as
- A.
Acceleration.
- B.
Deceleration.
- C.
Negative acceleration.
- D.
All of the above.
- 12.Which of the following is NOT an example of a force being exerted?
- A.
Pushing a door open
- B.
Typing on a computer keyboard
- C.
Sitting in a chair
- D.
None of the above
- 13.A friend is helping you to arrange your bedroom furniture. You exert 25 N of force to push the foot-end of the bed while your friend exerts 20 N of force pulling on the head-end of the bed. The net force being used to move the bed is
- A.
5 N forward
- B.
20 N forward
- C.
25 N forward
- D.
45 N forward
- 14.What is the net force when you combine a force of 7 N north with a force of 5 N south?
- A.
2 N north
- B.
2 N south
- C.
12 N north
- D.
12 N south
- 15.Balanced forces applied to an object
- A.
Produce a net force of zero.
- B.
Change the direction of a moving object.
- C.
Cause an object at rest to start moving.
- D.
Produce negative net force.
- 16.A good rule to observe when around a swimming pool is "no running." The deck around the pool becomes very slippery to walk on when wet due to
- A.
Sliding friction.
- B.
Rolling friction.
- C.
Fluid friction.
- D.
Static friction.
- 17.One way to increase friction is to use
- A.
Wax.
- B.
Water.
- C.
Sand.
- D.
Oil.
- 18.The air that comes out of the tiny holes of an air-hockey table is an example of
- A.
Net force.
- B.
Friction.
- C.
Gas lubricant.
- D.
Liquid lubricant.
- 19.An object's velocity remain constant when its __________ do not change.
- A.
Speed and direction
- B.
Speed and time in motion
- C.
Time in motion and direction
- D.
Distance traveled and time in motion
- 20.Your class and another class have a tug-of-war contest. For your class to win, your class must
- A.
Create a balanced force with the other class.
- B.
Have a greater force in the direction opposite the other class.
- C.
Have a greater force in the same direction as the other class.
- D.
Create a net force of zero with the other class.
- 21.You have made a house of cards on top of your table. Suddenly, a gust of wind blows through an open window and your house of cards comes tumbling down. The wind applied ______ to your house of cards.
- A.
Friction
- B.
A balanced force
- C.
An unbalanced force
- D.
A gravitational force
- 22.When applying brakes on a car or a bicycle, you are using _______ friction to stop.
- A.
Sliding
- B.
Rolling
- C.
Fluid
- D.
Static
- 23._______________ opposes motion between surfaces that are touching. (Friction or Gravity)
- 24.Forces are expressed in _______________. (newtons or mass)
- 25.A _______________ is determined by combining forces. (net force or newton)
- 26.Any change in position over time is an example of _______________. (motion or acceleration)
- 27.The newton is the SI unit of _______________. (force or mass)
- 28.When observing an object in motion in relation to an object that appears to stay in place, the object that appears to stay in place is a _______________. (friction point or reference point)
- 29.Total distance divided by total time gives ab object's average _______________. (speed or acceleration)
- 30.The speed of an object in a particular direction is an object's _______________. (speed or velocity)
- 31.A push or a pull is a _______________. (friction or force)
- 32.When the net force on an object is not zero, the forces on the object are _______________. (unbalanced or balanced)
- 33.When a force is applied to an object but does NOT cause the object to move, _______________ occurs. (static friction or sliding friction)
- 34._______________ are substances that are applied to surfaces in order to reduce the friction between them. (lubricants or friction)
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