20 Questions
| Total Attempts: 1547

Introduction to the Physics of Motion

Questions and Answers

- 1.A point against which position is measured is called:
- A.
Vector Point

- B.
Acceleration Point

- C.
Reference Point

- D.
Position Point

- 2.A physical measurement that contains directional information is called:
- A.
Vector Quantity

- B.
Scalar Quantity

- C.
Directional Quantity

- 3.A physical measurement that does not contain directional information is called:
- A.
Vector Quantity

- B.
Scalar Quantity

- C.
Directional Quantity

- 4.The time rate of change of an object's velocity is called:
- A.
Acceleration

- B.
Speed

- C.
Direction

- D.
Free Fall

- 5.The motion of an object when it is falling solely under the influence of gravity is called:
- A.
Acceleration

- B.
Speed

- C.
Direction

- D.
Free Fall

- 6.Why must one use a reference point to determine whether or not an object is in motion?
- A.
It allows you to determine whether or not position changes.

- B.
So one can know where to start.

- C.
Motion depends on direction.

- D.
Reference point will show the speed of the motion.

- 7.After a visit to your grandmother's house, you get in your car to go home. You are in the front passenger's seat and your mother is driving. As you back out of your grandmother's driveway, she stands outside, waving good-bye. Who is in motion relative to you?
- A.
You

- B.
Your mother

- C.
Your Grandmother

- 8.After a visit to your grandmother's house, you get in your car to go home. You are in the front passenger's seat and your mother is driving. As you back out of your grandmother's driveway, she stands outside, waving good-bye. Who is motionless relative to you?
- A.
You

- B.
Your mother

- C.
Your grandmother

- 9.How many miles per hour does a car travel if it makes a 40-mile trip in 30 minutes? (Please set up your problem using the correct formula and do your work on a sheet of paper, not in your head! :))
- A.
20 mph

- B.
40 mph

- C.
60 mph

- D.
80 mph

- 10.What is the velocity of a bicycle (in meters per second) if it travels 1 kilometer west in 4.1 minutes? (Please set up your problem using the correct formula and do your work on a sheet of paper, not in your head! :))
- A.
68.35 m/s west

- B.
0.41 m/s east

- C.
4.07 m/s west

- D.
40.65 m/s east

- 11.You are looking in a scientist's lab notebook and find the following unlabeled measurement. Determine what physical quantity the scientist was measuring: 12.1 meters per second
- A.
Acceleration

- B.
Distance

- C.
Speed

- D.
Velocity

- 12.You are again looking in this scientist's lab notebook and again you find the following unlabeled measurement. Determine what physical quantity the scientist was measuring: 31.2 feet
- A.
Acceleration

- B.
Distance

- C.
Speed

- D.
Velocity

- 13.For a third time, you look in the scientist's lab notebook and find another unlabeled measurement. Determine what physical quantity the scientist was measuring: 14 millimeters per hour to the west
- A.
Acceleration

- B.
Distance

- C.
Speed

- D.
Velocity

- 14.You are getting tired of looking in this scientist's lab notebook, but you decide to look one more time just for the fun of it and find the last unlabeled measurement. Determine what physical quantity this scientist was measuring: 4.5 yards per minute (squared) north
- A.
Acceleration

- B.
Distance

- C.
Speed

- D.
Velocity

- 15.An eagle swoops down to catch a baby rabbit. Luckily for the rabbit, he sees the eagle and runs. An all-out chase ensues with the rabbit running east at 5.4 meters per second and the eagle pursuing at 4.4 meters per second. What is the relative velocity of predator and prey? (Please set up your problem using the correct formula and do your work on a sheet of paper, not in your head! :))
- A.
9.8 m/s away from each other

- B.
1.0 m/s away from each other

- C.
1.23 m/s toward each other

- D.
0.81 m/s away from each other

- 16.The acceleration of an object that moves with constant velocity is zero.
- A.
True

- B.
False

- 17.A skier reaches the bottom of a slope with a velocity of 12 meters per second north. If the skier comes to a complete stop in 3 seconds, what was her acceleration? (Please set up your problem using the correct formula and do your work on a sheet of paper, not in your head! :))
- A.
36 m/s (squared) north

- B.
-36 m/s (squared) south

- C.
4 m/s (squared) south

- D.
-4 m/s (squared) north

- 18.A car goes from 0 to 60 miles per hour north in 5 seconds. What is the car's acceleration? (Please set up your problem using the correct formula and do your work on a sheet of paper, not in your head! :))
- A.
300 miles/hour (squared) north

- B.
431.65 miles/hour (squared) south

- C.
30,000 miles/h (squared) south

- D.
43,165 miles/h (squared) north

- 19.A person standing on a bridge over a river holds a rock and a ball in each hand. He throws the ball down towards the river as hard as he can and at the same time simply drops the rock. After both have left the person's hand, does one have a greater acceleration? If so, which one?
- A.
Yes, the ball will have a greater acceleration because he threw it as hard as he could.

- B.
Yes the rock will have a greater acceleration because it is more dense than the ball.

- C.
No, neither one has greater acceleration.

- 20.A physics student climbs a tree. To measure how high she has climbed, she drops a rock and times its fall. It takes 1.3 seconds for the rock to hit the ground. How many feet has she climbed? (Please set up your problem using the correct formula and do your work on a sheet of paper, not in your head! :))
- A.
20.8 feet

- B.
27.04 feet

- C.
41.6 feet

- D.
54.08 feet

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