Physical Science

Chapter 2: Motion

Motion and Speed

1.
Newton's first law of motion states that __________.
A)when a force acts on an object, its acceleration is in the same direction as the force
B)when a force is applied on an object, there is an equal force applied by the object in the opposite direction
C)an object will remain at rest or keep moving unless a force acts on it
D)acceleration is calculated by dividing the force exerted on an object by the mass of the object
2.
__________ is the change in velocity divided by the time needed for the change to occur.
A)Average velocity
B)Speed
C)Acceleration
D)Displacement
3.
Any change over time is called a(n) __________.
A)speed
B)acceleration
C)velocity
D)rate
4.
Average speed is found by __________.
A)multiplying total distance traveled by the total time
B)multiplying the displacement by the total time spent
C)dividing the displacement by the total time spent
D)dividing total distance traveled by the total time
5.
The __________ is the combination of all the forces acting on an object.
A)direction of motion
B)inertia
C)force pair
D)net force
6.
__________ measures an object's tendency to resist changing its motion.
A)Mass
B)Acceleration
C)Gravity
D)Inertia
7.
__________ is the speed of an object at any instant of time.
A)Instantaneous speed
B)Velocity
C)Acceleration
D)Average speed
8.
The distance between the final position and the starting position is the __________.
A)acceleration
B)velocity
C)differential
D)displacement
9.
Changes in which of the following of Earth's layers cause earthquakes?
A)lithosphere
B)magnetosphere
C)stratosphere
D)core
10.
The direction and speed of an object is described by its __________.
A)displacement
B)average speed
C)velocity
D)average displacement
11.
If a runner maintains a constant speed of 12 km/h, how long will it take to complete a marathon race of 26.2 miles?
A)5.3 h
B)3.52 h
C)3.14 h
D)2.18 h
12.
At 8:00 AM you leave home and walk 0.5 km to a friend's house. At 11:30 AM you return home, then travel by car to the mall, which is 10 km away, and arrive at 11:45 AM. What is the total distance traveled?
A)10 km
B)2.8 km/h
C)11 km
D)10.5 km
13.
If you travel 1.7 km north from your house at noon, and at 6:00 PM you travel 5.4 km south, what is your displacement?
A)7.1 km north
B)3.7 km
C)3.7 km south
D)7.1 km south
14.
To calculate the distance traveled continuously in a straight line, __________.
A)divide the distance traveled by the time needed to travel the distance
B)divide the change in velocity by the time over which the change occurs
C)subtract the time needed to travel the distance by the total distance traveled
D)subtract final position from starting position
15.
A(n) __________ is a push or a pull that one body exerts on another.
A)motion
B)acceleration
C)velocity
D)force
16.
The distance between an object and a reference point is the object's __________.
A)position
B)neutral point
C)displacement
D)velocity
17.
Motion occurs when an object changes its __________.
A)volume
B)mass
C)force
D)position
18.
If a student leaves home at 7:30 AM to walk to his school 2 km away, stops at a neighbor's house for 15 min, then arrives at school at 8:00 AM, what is the student's average speed for the trip to school?
A)2 km/h
B)4 km/h
C)2.67 km/h
D)8 km/h
19.
Which of the following is not an acceleration?
A)stopping your bike at an intersection
B)riding your bike straight down the street at a constant speed
C)riding your bike faster when you ride down a hill
D)slowing your bike ride so you can make it up a hill
20.
The SI unit of distance is the __________.
A)liter
B)meter
C)gram
D)mile
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