Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
1. T or F: Force is a scalar quantity.: f
2. The push or pull of an object can be best described by what scientific term?
a. friction
b. dynamic motion
c. gravity
d. force: d
3. What is the magnitude of a vector that makes an angle of 85° to the horizon- tal and whose x component is 12
m?
a. 12.0 m
b. 11.9 m
c. 1.0 m
d. 137.7 m: d
The magnitude of the vector can be calculated by using the analytical method for vectors.
h = 12/cos(85°)
4. Celia and Jane are on the roof of their school. Each woman has an identical ball that they release from the roof
at the same time. However, while Celia drops her ball from rest, Jane releases her ball with a small horizontal
velocity. Assuming that air resistance is negligible, which ball will hit the ground first?
a. Celia's ball
b. Jane's ball
c. not enough information
d. The two balls hit the ground at the same time.: d
5. Newton's first law of motion states that a body in motion does what if it is not acted on by a net force?
a. comes to rest
b. changes direction
c. maintains a constant velocity
d. increases inertia: c
6. T or F: An object's mass is directly proportional to its inertia.: t
7. A large rock is ejected from a volcano with a speed of 30 m/s and at an angle 60° above the horizontal. The
rock strikes the side of the volcano at an altitude
10.0 m lower than its starting point. Calculate the horizontal distance traveled by the rock.
, Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
a. 193.20 m
b. 169.80 m
, Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
c. 96.59 m
d. 84.90 m: d
8. If you determine that the uncertainty of your measurements is very high, what does this say about the level
of accuracy?
a. more information is needed
b. accuracy is high
c. accuracy is low: c
9. How are mass and Earth's gravitational force on a body related?
a. they are the same thing
b. they are proportional
c. they are not related: b
10.If a constant, nonzero force is applied to an object that is at rest, what can you say about the velocity and
acceleration of the object as the force is applied?
a. velocity changes, acceleration changes
b. velocity remains constant, acceleration remains constant
c. velocity remains constant, acceleration changes
d. velocity changes, acceleration remains constant: d
11.Some hummingbirds beat their wings more than 50 times per second. A scientist is measuring the time it
takes for a hummingbird to beat its wings once. Which SI-base unit (i.e., fundamental unit) should the scientist
use to describe the measurement? Which factor equal to a power of 10 is the scientist likely to use to describe the
motion precisely? Identify the metric prefix that corresponds to this factor of ten.
a. the scientist will measure the time between each movement using the fundamental unit of distance. this is
because the wings beat so quickly that the scientist will probably measure in millimeters
b. the scientist will measure the time between each movement using the fundamental unit of time. this is
because the wings beat so quickly that the scientist will probably measure in millimeters
c. the scientist will measure the time between each movement using the fundamental unit of distance
d. the scientist will measure the time between each movement using the fundamental unit of time. this is
because the wings beat so quickly that the scientist will probably measure in milliseconds: d
12.The Earth and the Moon exert forces on each other but the Moon is roughly one fourth the size and one
eightieth the mass of the Earth. T or F: The
, Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
magnitude of the force the Earth exerts on the Moon is equal to the magnitude of the force the Moon exerts on the
Earth.: T
13.A large truck collides with a small car. T or F: The truck exerted a greater magnitude of force on the car
than the car exerted on the truck.: F
14.A bag of apples is weighed using a rope and a spring scale. How should you change the number of apples to
decrease the tension in the rope?
a. add more apples to the bag
b. remove apples from the bag: b
15.A skydiver with a mass of 75 kg jumps out of a plane. When she reaches terminal velocity, what is the net
force on the skydiver?
a. less than 735 N, but more than 0
b. 735 N
c. 0: 0
16.A wooden block rests on a ramp inclined at 30 degrees with the horizontal. How does the magnitude of the
normal force on the block change if you lower the ramp of the include of 15 degrees?
a. it increases
b. it decreases
c. it remains constant: a
17.A large semi-truck, with mass 31 m crashes into a small sedan with mass
m. If the semi-truck exerts a force F on the sedan, what force with the sedan exert on the semi-truck.
a. 30 F
b. 2 F
c. F/30
d. F: d
18.A 55 kg lady stands on a bathroom scale inside an elevator. The scale reads 70 kg. What do you know about
the motion of the elevator.
a. the elevator must be accelerating upward
b. the elevator must be accelerating downward
c. the elevator must be moving upward with constant velocity
d. the elevator must be moving downward with constant velocity: a
The scale must provide a force on the lady not only to counteract her weight but also to accelerate her upward. The lady in
turn applies a force of equal magnitude but in the opposite direction of the scale, which gives the scale reading. Thus, the
Questions to Study
1. T or F: Force is a scalar quantity.: f
2. The push or pull of an object can be best described by what scientific term?
a. friction
b. dynamic motion
c. gravity
d. force: d
3. What is the magnitude of a vector that makes an angle of 85° to the horizon- tal and whose x component is 12
m?
a. 12.0 m
b. 11.9 m
c. 1.0 m
d. 137.7 m: d
The magnitude of the vector can be calculated by using the analytical method for vectors.
h = 12/cos(85°)
4. Celia and Jane are on the roof of their school. Each woman has an identical ball that they release from the roof
at the same time. However, while Celia drops her ball from rest, Jane releases her ball with a small horizontal
velocity. Assuming that air resistance is negligible, which ball will hit the ground first?
a. Celia's ball
b. Jane's ball
c. not enough information
d. The two balls hit the ground at the same time.: d
5. Newton's first law of motion states that a body in motion does what if it is not acted on by a net force?
a. comes to rest
b. changes direction
c. maintains a constant velocity
d. increases inertia: c
6. T or F: An object's mass is directly proportional to its inertia.: t
7. A large rock is ejected from a volcano with a speed of 30 m/s and at an angle 60° above the horizontal. The
rock strikes the side of the volcano at an altitude
10.0 m lower than its starting point. Calculate the horizontal distance traveled by the rock.
, Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
a. 193.20 m
b. 169.80 m
, Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
c. 96.59 m
d. 84.90 m: d
8. If you determine that the uncertainty of your measurements is very high, what does this say about the level
of accuracy?
a. more information is needed
b. accuracy is high
c. accuracy is low: c
9. How are mass and Earth's gravitational force on a body related?
a. they are the same thing
b. they are proportional
c. they are not related: b
10.If a constant, nonzero force is applied to an object that is at rest, what can you say about the velocity and
acceleration of the object as the force is applied?
a. velocity changes, acceleration changes
b. velocity remains constant, acceleration remains constant
c. velocity remains constant, acceleration changes
d. velocity changes, acceleration remains constant: d
11.Some hummingbirds beat their wings more than 50 times per second. A scientist is measuring the time it
takes for a hummingbird to beat its wings once. Which SI-base unit (i.e., fundamental unit) should the scientist
use to describe the measurement? Which factor equal to a power of 10 is the scientist likely to use to describe the
motion precisely? Identify the metric prefix that corresponds to this factor of ten.
a. the scientist will measure the time between each movement using the fundamental unit of distance. this is
because the wings beat so quickly that the scientist will probably measure in millimeters
b. the scientist will measure the time between each movement using the fundamental unit of time. this is
because the wings beat so quickly that the scientist will probably measure in millimeters
c. the scientist will measure the time between each movement using the fundamental unit of distance
d. the scientist will measure the time between each movement using the fundamental unit of time. this is
because the wings beat so quickly that the scientist will probably measure in milliseconds: d
12.The Earth and the Moon exert forces on each other but the Moon is roughly one fourth the size and one
eightieth the mass of the Earth. T or F: The
, Physics Concept Coach and Pre-Lab Questions and General
Questions to Study
magnitude of the force the Earth exerts on the Moon is equal to the magnitude of the force the Moon exerts on the
Earth.: T
13.A large truck collides with a small car. T or F: The truck exerted a greater magnitude of force on the car
than the car exerted on the truck.: F
14.A bag of apples is weighed using a rope and a spring scale. How should you change the number of apples to
decrease the tension in the rope?
a. add more apples to the bag
b. remove apples from the bag: b
15.A skydiver with a mass of 75 kg jumps out of a plane. When she reaches terminal velocity, what is the net
force on the skydiver?
a. less than 735 N, but more than 0
b. 735 N
c. 0: 0
16.A wooden block rests on a ramp inclined at 30 degrees with the horizontal. How does the magnitude of the
normal force on the block change if you lower the ramp of the include of 15 degrees?
a. it increases
b. it decreases
c. it remains constant: a
17.A large semi-truck, with mass 31 m crashes into a small sedan with mass
m. If the semi-truck exerts a force F on the sedan, what force with the sedan exert on the semi-truck.
a. 30 F
b. 2 F
c. F/30
d. F: d
18.A 55 kg lady stands on a bathroom scale inside an elevator. The scale reads 70 kg. What do you know about
the motion of the elevator.
a. the elevator must be accelerating upward
b. the elevator must be accelerating downward
c. the elevator must be moving upward with constant velocity
d. the elevator must be moving downward with constant velocity: a
The scale must provide a force on the lady not only to counteract her weight but also to accelerate her upward. The lady in
turn applies a force of equal magnitude but in the opposite direction of the scale, which gives the scale reading. Thus, the
