Question 1

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

Accepted Answer

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

Question 2

To say there is no such thing as only one force means

Accepted Answer

A) there must also be an oppositely directed force. 
B) other forces,perhaps not evident,are there. 
C) gibberish. 
A) there must also be an oppositely directed force. 
B) other forces,perhaps not evident,are there. 
C) gibberish.

Question 3

If your automobile runs out of fuel while driving,the engine stops.You don't come to an abrupt stop because of

Accepted Answer

A) inertia. 
B) gravity. 
C) resistance. 
D) the principle of continuation. 
A) inertia. 
B) gravity. 
C) resistance. 
D) the principle of continuation.

Question 4

Both ends of a piece of rope are pulled by two people in a tug-of-war.If each pulls with a 400-N force,the tension in the rope is

Accepted Answer

A) 0 N. 
B) 400 N. 
C) 600 N. 
D) 800 N. 
E) none of the above 
A) 0 N. 
B) 400 N. 
C) 600 N. 
D) 800 N. 
E) none of the above

Question 5

How many forces act on an upwardly tossed coin when it gets to the top of its path?

Accepted Answer

A) one; the force due to gravity 
B) two; gravity and the force in the coin itself 
C) three; gravity,the coin's internal force,and a turnaround force 
D) none of the above 
A) one; the force due to gravity 
B) two; gravity and the force in the coin itself 
C) three; gravity,the coin's internal force,and a turnaround force 
D) none of the above

Question 6

You're in a fast-moving train traveling at constant velocity.If you jump straight up you land

Accepted Answer

A) slightly ahead of your original position. 
B) at your original position. 
C) slightly behind your original position. 
A) slightly ahead of your original position. 
B) at your original position. 
C) slightly behind your original position.

Question 7

Earth pulls on the Moon.Similarly the Moon pulls on Earth,evidence that

Accepted Answer

A) Earth and Moon pull on each other. 
B) Earth's and Moon's pulls comprise an action-reaction pair. 
C) both of the above 
D) none of the above 
A) Earth and Moon pull on each other. 
B) Earth's and Moon's pulls comprise an action-reaction pair. 
C) both of the above 
D) none of the above

Question 8

A player hits a ball with a bat.If one part of the interaction is the bat against the ball,the other part is the

Accepted Answer

A) air resistance on the ball. 
B) weight of the ball. 
C) ball against the bat. 
D) grip of the player's hand against the ball. 
E) none of the above 
A) air resistance on the ball. 
B) weight of the ball. 
C) ball against the bat. 
D) grip of the player's hand against the ball. 
E) none of the above

Question 9

A 1000-kg car accelerates at 2 m/s2.What is the net force exerted on the car?

Accepted Answer

A) 500 N 
B) 1000 N 
C) 1500 N 
D) 2000 N 
E) none of these 
A) 500 N 
B) 1000 N 
C) 1500 N 
D) 2000 N 
E) none of these

Question 10

A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves at constant velocity.When the glue gives way,the stone falls and hits the floor

Accepted Answer

A) ahead of the midpoint of the ceiling. 
B) exactly below the midpoint of the ceiling. 
C) behind the midpoint of the ceiling. 
D) none of the above 
A) ahead of the midpoint of the ceiling. 
B) exactly below the midpoint of the ceiling. 
C) behind the midpoint of the ceiling. 
D) none of the above

Question 11

When a rock thrown straight up reaches the exact top of its path,its velocity is

Accepted Answer

A) zero and its acceleration is zero. 
B) zero and its acceleration is 10 m/s2. 
C) about 10 m/s and its acceleration is zero. 
D) about 10 m/s and its acceleration is 10 m/s2. 
A) zero and its acceleration is zero. 
B) zero and its acceleration is 10 m/s2. 
C) about 10 m/s and its acceleration is zero. 
D) about 10 m/s and its acceleration is 10 m/s2.

Question 12

When a baseball player hits a ball with a force of 1000 N,the ball exerts a force on the bat of

Accepted Answer

A) less than 1000 N. 
B) more than 1000 N. 
C) 1000 N. 
A) less than 1000 N. 
B) more than 1000 N. 
C) 1000 N.

Question 13

A hockey puck slides across a frozen pond.If ice friction and air resistance are neglected,the force needed to keep the puck sliding at constant velocity is

Accepted Answer

A) 0 N. 
B) equal to the weight of the puck. 
C) the weight of the puck divided by the mass of the puck. 
D) the mass of the puck multiplied by 10 m/s2. 
E) none of the above 
A) 0 N. 
B) equal to the weight of the puck. 
C) the weight of the puck divided by the mass of the puck. 
D) the mass of the puck multiplied by 10 m/s2. 
E) none of the above

Question 14

When a rocket ship gaining speed in remote,gravity-free outer space runs out of fuel,it

Accepted Answer

A) gains speed for a short time,then slows down to a constant velocity. 
B) gains speed for a short time,slows down,and eventually stops. 
C) no longer gains speed. 
D) comes to a quick stop. 
A) gains speed for a short time,then slows down to a constant velocity. 
B) gains speed for a short time,slows down,and eventually stops. 
C) no longer gains speed. 
D) comes to a quick stop.

Question 15

A martial arts person breaks a board with a blow of 3000 N.The force that acts on the hand is

Accepted Answer

A) less than 3000 N. 
B) 3000 N. 
C) more than 3000 N. 
D) not enough information 
A) less than 3000 N. 
B) 3000 N. 
C) more than 3000 N. 
D) not enough information

Question 16

A car by itself is capable of a certain maximum acceleration.When it tows a car of the same mass,its maximum acceleration is

Accepted Answer

A) half. 
B) one-third. 
C) one-fourth. 
D) the same. 
E) none of these 
A) half. 
B) one-third. 
C) one-fourth. 
D) the same. 
E) none of these

Question 17

When you toss a coin straight up,it moves upward,turns around,and drops.During all this time the acceleration of the coin is

Accepted Answer

A) upward and constant. 
B) downward and constant. 
C) first decreasing,then increasing. 
D) zero throughout its up and down motion. 
A) upward and constant. 
B) downward and constant. 
C) first decreasing,then increasing. 
D) zero throughout its up and down motion.

Question 18

Nellie whirls a tether ball in a horizontal circular path over her head.If the action force is Nellie pulling on the string,the reaction force is

Accepted Answer

A) Nellie pulling on the string. 
B) the string pulling on Nellie. 
C) the ball pulling on the string. 
D) none of the above 
A) Nellie pulling on the string. 
B) the string pulling on Nellie. 
C) the ball pulling on the string. 
D) none of the above

Question 19

When an apple that weighs 1 N is dropped and freely falls,the net force on the apple is

Accepted Answer

A) 0 N. 
B) 0.1 N. 
C) 1 N. 
D) 10 N. 
E) none of the above 
A) 0 N. 
B) 0.1 N. 
C) 1 N. 
D) 10 N. 
E) none of the above

Question 20

A ball tossed vertically upward reaches its highest point and then falls back to its starting point.During this up-and-down motion the acceleration of the ball is always

Accepted Answer

A) in the direction of motion. 
B) opposite its velocity. 
C) directed upward. 
D) directed downward. 
A) in the direction of motion. 
B) opposite its velocity. 
C) directed upward. 
D) directed downward.

Exam 2: Newtons Laws of Motion

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

To say there is no such thing as only one force means

If your automobile runs out of fuel while driving,the engine stops.You don't come to an abrupt stop because of

Both ends of a piece of rope are pulled by two people in a tug-of-war.If each pulls with a 400-N force,the tension in the rope is

How many forces act on an upwardly tossed coin when it gets to the top of its path?

You're in a fast-moving train traveling at constant velocity.If you jump straight up you land

Earth pulls on the Moon.Similarly the Moon pulls on Earth,evidence that

A player hits a ball with a bat.If one part of the interaction is the bat against the ball,the other part is the

A 1000-kg car accelerates at 2 m/s2.What is the net force exerted on the car?

A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves at constant velocity.When the glue gives way,the stone falls and hits the floor

When a rock thrown straight up reaches the exact top of its path,its velocity is

When a baseball player hits a ball with a force of 1000 N,the ball exerts a force on the bat of

A hockey puck slides across a frozen pond.If ice friction and air resistance are neglected,the force needed to keep the puck sliding at constant velocity is

When a rocket ship gaining speed in remote,gravity-free outer space runs out of fuel,it

A martial arts person breaks a board with a blow of 3000 N.The force that acts on the hand is

A car by itself is capable of a certain maximum acceleration.When it tows a car of the same mass,its maximum acceleration is

When you toss a coin straight up,it moves upward,turns around,and drops.During all this time the acceleration of the coin is

Nellie whirls a tether ball in a horizontal circular path over her head.If the action force is Nellie pulling on the string,the reaction force is

When an apple that weighs 1 N is dropped and freely falls,the net force on the apple is

A ball tossed vertically upward reaches its highest point and then falls back to its starting point.During this up-and-down motion the acceleration of the ball is always

Patterns of Motion and Equilibrium

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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A 1000-kg car accelerates at 2 m/s².What is the net force exerted on the car?