Question 1

An apple at rest weighs 1 N. The net force on the apple when it is in free fall is

Accepted Answer

A)  0 N. 
B)  1 N. 
C)  9.8 N. 
D)  0.1 N. 
E)  none of these 
A)  0 N. 
B)  1 N. 
C)  9.8 N. 
D)  0.1 N. 
E)  none of these

Question 2

A rocket becomes progressively easier to accelerate as it travels upward from the ground mainly because

Accepted Answer

A)  the applied force on the rocket increases as burning of fuel progresses. 
B)  the mass of the rocket decreases as fuel is burned. 
C)  gravity becomes weaker with increased distance. 
A)  the applied force on the rocket increases as burning of fuel progresses. 
B)  the mass of the rocket decreases as fuel is burned. 
C)  gravity becomes weaker with increased distance.

Question 3

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is

Accepted Answer

A)  greater on the car. 
B)  greater on the bug. 
C)  the same for both. 
A)  greater on the car. 
B)  greater on the bug. 
C)  the same for both.

Question 4

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the

Accepted Answer

A)  air resistance on the ball. 
B)  grip of the player's hand against the ball. 
C)  force that the ball exerts on the bat. 
D)  weight of the bat. 
E)  weight of the ball. 
A)  air resistance on the ball. 
B)  grip of the player's hand against the ball. 
C)  force that the ball exerts on the bat. 
D)  weight of the bat. 
E)  weight of the ball.

Question 5

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second when taking off?

Accepted Answer

A)  2 
B)  4 
C)  0.25 
D)  1 
E)  none of these 
A)  2 
B)  4 
C)  0.25 
D)  1 
E)  none of these

Question 6

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

Accepted Answer

A)  less. 
B)  more. 
C)  the same. 
A)  less. 
B)  more. 
C)  the same.

Question 7

Wherever the is an action force, there must be a reaction force which

Accepted Answer

A)  is exactly equal in magnitude. 
B)  always acts in the same direction. 
C)  is slightly smaller in magnitude than the action force. 
D)  is slightly larger in amplitude than the action force. 
A)  is exactly equal in magnitude. 
B)  always acts in the same direction. 
C)  is slightly smaller in magnitude than the action force. 
D)  is slightly larger in amplitude than the action force.

Question 8

A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?

Accepted Answer

A)  more than 6 N 
B)  less than 6 N 
C)  6 N 
D)  need more information to say 
A)  more than 6 N 
B)  less than 6 N 
C)  6 N 
D)  need more information to say

Question 9

An apple weighs 1 N. When held at rest above your head, the net force on the apple is

Accepted Answer

A)  1 N. 
B)  9.8 N. 
C)  0 N. 
D)  0.1 N. 
E)  none of these 
A)  1 N. 
B)  9.8 N. 
C)  0 N. 
D)  0.1 N. 
E)  none of these

Question 10

Two factors that greatly affect air resistance on falling objects are the

Accepted Answer

A)  size and weight of the object. 
B)  size and mass of the object. 
C)  size and speed of the object. 
A)  size and weight of the object. 
B)  size and mass of the object. 
C)  size and speed of the object.

Question 11

Your car is coasting on level ground at 60 km/h and you apply the brakes until the car slows to 40 km/h. If you suddenly release the brakes now, the car tends to

Accepted Answer

A)  decrease in speed if no other forces act. 
B)  continue moving at 40 km/h. 
C)  momentarily regain its higher initial speed. 
A)  decrease in speed if no other forces act. 
B)  continue moving at 40 km/h. 
C)  momentarily regain its higher initial speed.

Question 12

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity,

Accepted Answer

A)  the friction force increases. 
B)  the object accelerates in the direction of the applied force. 
C)  the object accelerates opposite the direction of the applied force. 
D)  two of the above 
E)  none of the above 
A)  the friction force increases. 
B)  the object accelerates in the direction of the applied force. 
C)  the object accelerates opposite the direction of the applied force. 
D)  two of the above 
E)  none of the above

Question 13

A rock is thrown vertically into the air. At the top of its path, its acceleration in meters per second per second is

Accepted Answer

A)  zero. 
B)  greater than 9.8. 
C)  between 0 and 9.8. 
D)  9.8. 
A)  zero. 
B)  greater than 9.8. 
C)  between 0 and 9.8. 
D)  9.8.

Question 14

If an object of constant mass experiences a constant net force, it will have a constant

Accepted Answer

A)  position. 
B)  acceleration. 
C)  velocity. 
D)  speed. 
E)  more than one of the above 
A)  position. 
B)  acceleration. 
C)  velocity. 
D)  speed. 
E)  more than one of the above

Question 15

When a falling object has reached its terminal velocity, its acceleration is

Accepted Answer

A)  zero. 
B)  g. 
C)  constant. 
A)  zero. 
B)  g. 
C)  constant.

Question 16

A skydiver falls towards the Earth. The attraction of the Earth on the diver pulls the diver down. What is the reaction to this force?

Accepted Answer

A)  water resistance that will soon act upward on the diver 
B)  the attraction to the planets, stars, and every particle in the universe 
C)  air resistance the diver encounters while falling 
D)  all of these 
E)  none of these 
A)  water resistance that will soon act upward on the diver 
B)  the attraction to the planets, stars, and every particle in the universe 
C)  air resistance the diver encounters while falling 
D)  all of these 
E)  none of these

Question 17

A large and a small person wish to parachute at equal terminal velocities. The larger person will have to

Accepted Answer

A)  get a larger parachute. 
B)  jump lightly. 
C)  jump first from the plane. 
D)  pull upward on the supporting strands to decrease the downward net force. 
A)  get a larger parachute. 
B)  jump lightly. 
C)  jump first from the plane. 
D)  pull upward on the supporting strands to decrease the downward net force.

Question 18

The newton is a unit of

Accepted Answer

A)  mass. 
B)  density. 
C)  force. 
D)  inertia. 
A)  mass. 
B)  density. 
C)  force. 
D)  inertia.

Question 19

A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about

Accepted Answer

A)  7.5 N. 
B)  1 N. 
C)  1/2 N. 
D)  5 N. 
E)  10 N. 
A)  7.5 N. 
B)  1 N. 
C)  1/2 N. 
D)  5 N. 
E)  10 N.

Question 20

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom

Accepted Answer

A)  before the light block. 
B)  at the same time as the light block. 
C)  after the light block. 
A)  before the light block. 
B)  at the same time as the light block. 
C)  after the light block.

An apple at rest weighs 1 N. The net force on the apple when it is in free fall is

A rocket becomes progressively easier to accelerate as it travels upward from the ground mainly because

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second when taking off?

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

Wherever the is an action force, there must be a reaction force which

A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?

An apple weighs 1 N. When held at rest above your head, the net force on the apple is

Two factors that greatly affect air resistance on falling objects are the

Your car is coasting on level ground at 60 km/h and you apply the brakes until the car slows to 40 km/h. If you suddenly release the brakes now, the car tends to

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity,

A rock is thrown vertically into the air. At the top of its path, its acceleration in meters per second per second is

If an object of constant mass experiences a constant net force, it will have a constant

When a falling object has reached its terminal velocity, its acceleration is

A skydiver falls towards the Earth. The attraction of the Earth on the diver pulls the diver down. What is the reaction to this force?

A large and a small person wish to parachute at equal terminal velocities. The larger person will have to

The newton is a unit of

A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom

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Exam 4: Newtons Laws of Motion

An apple at rest weighs 1 N. The net force on the apple when it is in free fall is

A rocket becomes progressively easier to accelerate as it travels upward from the ground mainly because

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second when taking off?

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

Wherever the is an action force, there must be a reaction force which

A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?

An apple weighs 1 N. When held at rest above your head, the net force on the apple is

Two factors that greatly affect air resistance on falling objects are the

Your car is coasting on level ground at 60 km/h and you apply the brakes until the car slows to 40 km/h. If you suddenly release the brakes now, the car tends to

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity,

A rock is thrown vertically into the air. At the top of its path, its acceleration in meters per second per second is

If an object of constant mass experiences a constant net force, it will have a constant

When a falling object has reached its terminal velocity, its acceleration is

A skydiver falls towards the Earth. The attraction of the Earth on the diver pulls the diver down. What is the reaction to this force?

A large and a small person wish to parachute at equal terminal velocities. The larger person will have to

The newton is a unit of

A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom

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