Matter In Motion Test

34 Questions | By Webert | Updated: Mar 21, 2022 | Attempts: 703

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Quiz to assess force and motion knowledge, as learned through the "Matter in Motion" lab.

Questions and Answers

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)