Question 1

The attraction of a person's body toward the Earth is called weight. The reaction to this force is

Accepted Answer

A)  the person's body pushing against the Earth's surface. 
B)  the person's body pulling on the Earth. 
C)  the Earth's surface pushing against the person's body. 
D)  none of these. 
A)  the person's body pushing against the Earth's surface. 
B)  the person's body pulling on the Earth. 
C)  the Earth's surface pushing against the person's body. 
D)  none of these.

Question 2

The force required to maintain an object at a constant velocity in free space is equal to

Accepted Answer

A)  the mass of the object. 
B)  zero. 
C)  the weight of the object. 
D)  the force required to stop it. 
E)  none of these 
A)  the mass of the object. 
B)  zero. 
C)  the weight of the object. 
D)  the force required to stop it. 
E)  none of these

Question 3

A 1-kg mass at the earth's surface weighs

Accepted Answer

A)  9.8 N. 
B)  10.8 N. 
C)  4.9 N. 
D)  1 N. 
E)  none of these 
A)  9.8 N. 
B)  10.8 N. 
C)  4.9 N. 
D)  1 N. 
E)  none of these

Question 4

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first?

Accepted Answer

A)  the heavy man 
B)  the light woman 
C)  Both should arrive at the same time 
D)  not enough information 
A)  the heavy man 
B)  the light woman 
C)  Both should arrive at the same time 
D)  not enough information

Question 5

An object following a straight-line path at constant speed

Accepted Answer

A)  has zero acceleration. 
B)  has no forces acting on it 
C)  has a net force acting upon it in the direction of motion. 
D)  none of these 
A)  has zero acceleration. 
B)  has no forces acting on it 
C)  has a net force acting upon it in the direction of motion. 
D)  none of these

Question 6

A lightweight feather slides off a table and falls through the air until it reaches the floor. During the time of its fall,.its acceleration

Accepted Answer

A)  keeps decreasing. 
B)  keeps increasing. 
C)  is sometimes zero. 
D)  never changes. 
A)  keeps decreasing. 
B)  keeps increasing. 
C)  is sometimes zero. 
D)  never changes.

Question 7

A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass?

Accepted Answer

A)  the one on the moon 
B)  the one on Earth 
C)  They have the same mass. 
D)  not enough information to say 
A)  the one on the moon 
B)  the one on Earth 
C)  They have the same mass. 
D)  not enough information to say

Question 8

If the mass of an object does not change, a constant net force on the object produces constant

Accepted Answer

A)  acceleration. 
B)  velocity. 
C)  both of these 
D)  neither of these 
A)  acceleration. 
B)  velocity. 
C)  both of these 
D)  neither of these

Question 9

A 10-N falling object encounters 4 N of air resistance. The net force on the object is

Accepted Answer

A)  6 N. 
B)  0 N. 
C)  10 N. 
D)  4 N. 
E)  none of these. 
A)  6 N. 
B)  0 N. 
C)  10 N. 
D)  4 N. 
E)  none of these.

Question 10

A falling skydiver of mass 100 kg experiences 500 N air resistance. The acceleration of the skydiver is

Accepted Answer

A)  0.5 g. 
B)  0.3 g. 
C)  0.4 g. 
D)  0.2 g. 
E)  more than 0.5 g. 
A)  0.5 g. 
B)  0.3 g. 
C)  0.4 g. 
D)  0.2 g. 
E)  more than 0.5 g.

Question 11

A tow truck exerts a force of 3000 N on a car, accelerating it at 2 meters per second per second. What is the mass of the car?

Accepted Answer

A)  1000 kg 
B)  1500 kg 
C)  500 kg 
D)  3000 kg 
E)  none of these 
A)  1000 kg 
B)  1500 kg 
C)  500 kg 
D)  3000 kg 
E)  none of these

Question 12

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

Accepted Answer

A)  zero. 
B)  one-tenth as much. 
C)  10 times as much 
D)  the same as the force on the 1-kg book. 
A)  zero. 
B)  one-tenth as much. 
C)  10 times as much 
D)  the same as the force on the 1-kg book.

Question 13

What horizontally-applied force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

Accepted Answer

A)  2400 N 
B)  2000 N 
C)  600 N 
D)  1600 N 
E)  none of these 
A)  2400 N 
B)  2000 N 
C)  600 N 
D)  1600 N 
E)  none of these

Question 14

A skydiver's terminal velocity will be greatest if she falls

Accepted Answer

A)  lying flat on her back. 
B)  lying flat on her stomach. 
C)  with her parachute open. 
D)  head first. 
A)  lying flat on her back. 
B)  lying flat on her stomach. 
C)  with her parachute open. 
D)  head first.

Question 15

A push on a 1-kg brick accelerates it. Neglecting friction, to equally accelerate a 10-kg brick, one would have to push with

Accepted Answer

A)  one tenth the amount of force. 
B)  just as much force. 
C)  100 times as much force. 
D)  10 times as much force. 
E)  none of these 
A)  one tenth the amount of force. 
B)  just as much force. 
C)  100 times as much force. 
D)  10 times as much force. 
E)  none of these

Question 16

A skydiver, who weighs 500 N, reaches terminal velocity of 90 km/h. The air resistance on the diver is then

Accepted Answer

A)  500 N. 
B)  90 N. 
C)  250 N. 
D)  410 N. 
E)  none of these 
A)  500 N. 
B)  90 N. 
C)  250 N. 
D)  410 N. 
E)  none of these

Question 17

A kilogram is a measure of an object's

Accepted Answer

A)  mass. 
B)  force. 
C)  size. 
D)  weight. 
A)  mass. 
B)  force. 
C)  size. 
D)  weight.

Question 18

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car just before the brakes were applied was

Accepted Answer

A)  45 m/s. 
B)  15 m/s. 
C)  1.2 m/s. 
D)  30 m/s. 
E)  none of these 
A)  45 m/s. 
B)  15 m/s. 
C)  1.2 m/s. 
D)  30 m/s. 
E)  none of these

Question 19

A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s2. The acceleration of a mass of 2 kg acted upon by a net force of 2 N is

Accepted Answer

A)  twice as much. 
B)  the same. 
C)  half as much. 
D)  none of these. 
A)  twice as much. 
B)  the same. 
C)  half as much. 
D)  none of these.

Question 20

A force is a vector quantity because it has both

Accepted Answer

A)  mass and acceleration. 
B)  magnitude and direction. 
C)  action and reaction counterparts. 
A)  mass and acceleration. 
B)  magnitude and direction. 
C)  action and reaction counterparts.

The attraction of a person's body toward the Earth is called weight. The reaction to this force is

The force required to maintain an object at a constant velocity in free space is equal to

A 1-kg mass at the earth's surface weighs

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first?

An object following a straight-line path at constant speed

A lightweight feather slides off a table and falls through the air until it reaches the floor. During the time of its fall,.its acceleration

A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass?

If the mass of an object does not change, a constant net force on the object produces constant

A 10-N falling object encounters 4 N of air resistance. The net force on the object is

A falling skydiver of mass 100 kg experiences 500 N air resistance. The acceleration of the skydiver is

A tow truck exerts a force of 3000 N on a car, accelerating it at 2 meters per second per second. What is the mass of the car?

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

What horizontally-applied force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

A skydiver's terminal velocity will be greatest if she falls

A push on a 1-kg brick accelerates it. Neglecting friction, to equally accelerate a 10-kg brick, one would have to push with

A skydiver, who weighs 500 N, reaches terminal velocity of 90 km/h. The air resistance on the diver is then

A kilogram is a measure of an object's

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car just before the brakes were applied was

A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s2. The acceleration of a mass of 2 kg acted upon by a net force of 2 N is

A force is a vector quantity because it has both

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Exam 4: Newtons Laws of Motion

The attraction of a person's body toward the Earth is called weight. The reaction to this force is

The force required to maintain an object at a constant velocity in free space is equal to

A 1-kg mass at the earth's surface weighs

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first?

An object following a straight-line path at constant speed

A lightweight feather slides off a table and falls through the air until it reaches the floor. During the time of its fall,.its acceleration

A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass?

If the mass of an object does not change, a constant net force on the object produces constant

A 10-N falling object encounters 4 N of air resistance. The net force on the object is

A falling skydiver of mass 100 kg experiences 500 N air resistance. The acceleration of the skydiver is

A tow truck exerts a force of 3000 N on a car, accelerating it at 2 meters per second per second. What is the mass of the car?

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

What horizontally-applied force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

A skydiver's terminal velocity will be greatest if she falls

A push on a 1-kg brick accelerates it. Neglecting friction, to equally accelerate a 10-kg brick, one would have to push with

A skydiver, who weighs 500 N, reaches terminal velocity of 90 km/h. The air resistance on the diver is then

A kilogram is a measure of an object's

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car just before the brakes were applied was

A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s2. The acceleration of a mass of 2 kg acted upon by a net force of 2 N is

A force is a vector quantity because it has both

About Science

Atoms

Equilibrium and Linear Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Temperature, Heat, and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light Waves

Properties of Light

Quantum Theory

The Atomic Nucleus and Radioactivity

Physics of Rotation and Equilibrium

Filters