Question 1

On a smooth floor, why will girls wearing gym shoes win in a tug-of-war with boys wearing socks?

Accepted Answer

The tension on both ends of the rope is

Question 2

A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The collision force is greatest on the

Accepted Answer

A) Mini Cooper. 
B) Mack truck. 
C) same 
A) Mini Cooper. 
B) Mack truck. 
C) same

Question 3

A block is dragged at constant velocity 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) less than 6 N 
B) more than 6 N 
C) 6 N 
D) not enough information 
A) less than 6 N 
B) more than 6 N 
C) 6 N 
D) not enough information

Question 4

Two people, one twice as massive as the other, attempt a tug-of-war with 12 m of rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of

Accepted Answer

A) 3 m. 
B) 4 m. 
C) 5 m. 
D) 6 m. 
A) 3 m. 
B) 4 m. 
C) 5 m. 
D) 6 m.

Question 5

When you drop a pencil while riding on a smoothly riding bus, why does the pencil land at the same place it would if the bus were at rest?

Accepted Answer

In accord with Newton's first law, in bo

Question 6

A ball rests in the middle of a cart. When you quickly jerk the cart forward, the ball

Accepted Answer

A) hits the front of the cart. 
B) hits the back of the cart. 
C) remains in the middle of the cart. 
D) all, depending on how quickly the cart is pulled. 
A) hits the front of the cart. 
B) hits the back of the cart. 
C) remains in the middle of the cart. 
D) all, depending on how quickly the cart is pulled.

Question 7

The acceleration of a rocket increases as it travels upward from the ground mainly because

Accepted Answer

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

Question 8

A large and a small person wish to parachute at equal terminal velocities. The large person should

Accepted Answer

A) jump first. 
B) jump lightly. 
C) pull upward on the supporting strands to decrease the downward net force. 
D) get a larger parachute. 
E) none of the above 
A) jump first. 
B) jump lightly. 
C) pull upward on the supporting strands to decrease the downward net force. 
D) get a larger parachute. 
E) none of the above

Question 9

The air resistance of falling is greatly affected by an object's frontal area and

Accepted Answer

A) mass. 
B) weight. 
C) speed. 
A) mass. 
B) weight. 
C) speed.

Question 10

Earth moves about 30 km/s relative to the Sun. When you jump upward in front of a wall, the wall doesn't slam into you at 30 km/s because the wall

Accepted Answer

A) has too little gravity to influence you. 
B) moves in the opposite direction to you. 
C) and you move at the same horizontal speed, before, during, and after your jump. 
D) has negligible inertia compared with the Sun. 
A) has too little gravity to influence you. 
B) moves in the opposite direction to you. 
C) and you move at the same horizontal speed, before, during, and after your jump. 
D) has negligible inertia compared with the Sun.

Question 11

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

Accepted Answer

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

Question 12

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

Accepted Answer

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

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

Arnold Strongman and Suzie Small each pull on opposite ends of a rope in a tug-of-war. The greatest force on the rope is exerted by

Accepted Answer

A) Arnold. 
B) Suzie. 
C) same 
A) Arnold. 
B) Suzie. 
C) same

Question 15

When a baseball player hits a ball with a force of 1000 N, the ball exerts 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 16

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

Accepted Answer

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

Question 17

A car has a mass of 1000 kg and accelerates at 2 m/s2. What is the magnitude of the force exerted on the car?

Accepted Answer

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

Question 18

A 10-kg block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block is

Accepted Answer

A) 1 m/s2. 
B) 2 m/s2. 
C) 5 m/s2. 
D) 10 m/s2. 
E) none of the above 
A) 1 m/s2. 
B) 2 m/s2. 
C) 5 m/s2. 
D) 10 m/s2. 
E) none of the above

Question 19

A commercial jet has a mass of 5,000 kg and the thrust of its engine is 10,000 N. The acceleration of the jet when taking off is

Accepted Answer

A) 0.5 m/s2. 
B) 1 m/s2. 
C) 2 m/s2. 
D) 4 m/s2. 
E) none of the above 
A) 0.5 m/s2. 
B) 1 m/s2. 
C) 2 m/s2. 
D) 4 m/s2. 
E) none of the above

Question 20

A ball thrown straight up takes 10 s to go up and return to the ground. Because of air resistance, the time taken for the ball just to go up is

Accepted Answer

A) less than 5 s. 
B) more than 5 s. 
C) 5 s. 
A) less than 5 s. 
B) more than 5 s. 
C) 5 s.

Exam 2: Newtons Laws of Motion

On a smooth floor, why will girls wearing gym shoes win in a tug-of-war with boys wearing socks?

A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The collision force is greatest on the

A block is dragged at constant velocity across a level surface by a force of 6 N. What is the force of friction between the block and the surface?

Two people, one twice as massive as the other, attempt a tug-of-war with 12 m of rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of

When you drop a pencil while riding on a smoothly riding bus, why does the pencil land at the same place it would if the bus were at rest?

A ball rests in the middle of a cart. When you quickly jerk the cart forward, the ball

The acceleration of a rocket increases as it travels upward from the ground mainly because

A large and a small person wish to parachute at equal terminal velocities. The large person should

The air resistance of falling is greatly affected by an object's frontal area and

Earth moves about 30 km/s relative to the Sun. When you jump upward in front of a wall, the wall doesn't slam into you at 30 km/s because the wall

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

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

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

Arnold Strongman and Suzie Small each pull on opposite ends of a rope in a tug-of-war. The greatest force on the rope is exerted by

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

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

A car has a mass of 1000 kg and accelerates at 2 m/s2. What is the magnitude of the force exerted on the car?

A 10-kg block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block is

A commercial jet has a mass of 5,000 kg and the thrust of its engine is 10,000 N. The acceleration of the jet when taking off is

A ball thrown straight up takes 10 s to go up and return to the ground. Because of air resistance, the time taken for the ball just to go up is

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 Timereading 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

Filters

A car has a mass of 1000 kg and accelerates at 2 m/s². What is the magnitude of the force exerted on the car?