Question 1

You should "follow through" when hitting a ball because

Accepted Answer

A) this increases the force. 
B) momentum is conserved. 
C) of the relationship $\Delta$p = Ft. 
D) momentum is mv. 
A) this increases the force. 
B) momentum is conserved. 
C) of the relationship $\Delta$p = Ft. 
D) momentum is mv.

Question 2

Newton's second law states that if an unbalanced force acts on an object, it will move at constant velocity.

Accepted Answer

A) True 
 B)False

Question 3

Suppose that a rock is swinging in a circle when some string is let out so that the length doubled as the same speed is maintained.The force now exerted on the string is

Accepted Answer

A) the same as before. 
B) doubled. 
C) half as great. 
D) four times as great. 
A) the same as before. 
B) doubled. 
C) half as great. 
D) four times as great.

Question 4

Gravity is an attractive force between

Accepted Answer

A) all massive objects. 
B) Earth and objects on Earth. 
C) Earth and Moon, and objects on Earth. 
D) all objects everywhere. 
A) all massive objects. 
B) Earth and objects on Earth. 
C) Earth and Moon, and objects on Earth. 
D) all objects everywhere.

Question 5

If you double the mass of an object while an unbalanced force remains constant,

Accepted Answer

A) the object moves at half the speed. 
B) the acceleration of the object is doubled. 
C) the object will gradually slow down. 
D) The acceleration of the object is halved. 
A) the object moves at half the speed. 
B) the acceleration of the object is doubled. 
C) the object will gradually slow down. 
D) The acceleration of the object is halved.

Question 6

From the equation w = mg, it is apparent that weight is a (an)

Accepted Answer

A) force. 
B) mass. 
C) acceleration. 
D) None of the above. 
A) force. 
B) mass. 
C) acceleration. 
D) None of the above.

Question 7

A boy on a skateboard pushes off the ground with his foot.He and the skateboard accelerate down the sidewalk due to the force

Accepted Answer

A) he exerts against the ground. 
B) between the skateboard wheels and the ground. 
C) the ground exerts against his foot. 
D) of gravity acting on the skateboard. 
A) he exerts against the ground. 
B) between the skateboard wheels and the ground. 
C) the ground exerts against his foot. 
D) of gravity acting on the skateboard.

Question 8

The attractive force a 70-kg person exerts on Earth is much, much smaller than the force Earth exerts on the person.

Accepted Answer

A) True 
 B)False

Question 9

The mass of a 100-N sack of seed is closest to

Accepted Answer

A) 10 kg. 
B) 10 lb. 
C) 98 kg. 
D) 1,000 kg. 
A) 10 kg. 
B) 10 lb. 
C) 98 kg. 
D) 1,000 kg.

Question 10

A cannon ball and a bowling ball were dropped at the same time from the top of a building.At the instant before the balls hit the sidewalk, the cannon ball has greater

Accepted Answer

A) velocity. 
B) acceleration. 
C) momentum. 
D) All of these are the same for the two balls. 
A) velocity. 
B) acceleration. 
C) momentum. 
D) All of these are the same for the two balls.

You should "follow through" when hitting a ball because

Newton's second law states that if an unbalanced force acts on an object, it will move at constant velocity.

Suppose that a rock is swinging in a circle when some string is let out so that the length doubled as the same speed is maintained.The force now exerted on the string is

Gravity is an attractive force between

If you double the mass of an object while an unbalanced force remains constant,

From the equation w = mg, it is apparent that weight is a (an)

A boy on a skateboard pushes off the ground with his foot.He and the skateboard accelerate down the sidewalk due to the force

The attractive force a 70-kg person exerts on Earth is much, much smaller than the force Earth exerts on the person.

The mass of a 100-N sack of seed is closest to

A cannon ball and a bowling ball were dropped at the same time from the top of a building.At the instant before the balls hit the sidewalk, the cannon ball has greater

What Is Science

Energy

Heat and Temperature

Wave Motions and Sound

Electricity

Light

Atoms and Periodic Properties

Chemical Bonds

Chemical Reactions

Water and Solutions

Organic Chemistry

Nuclear Reactions

The Universe

The Solar System

Earth in Space

Rocks and Minerals

Plate Tectonics

Building Earths Surface

Shaping Earths Surface

Geologic Time

The Atmosphere of Earth

Weather and Climate

Earths Waters

Filters

Exam 2: Motion

You should "follow through" when hitting a ball because

Newton's second law states that if an unbalanced force acts on an object, it will move at constant velocity.

Suppose that a rock is swinging in a circle when some string is let out so that the length doubled as the same speed is maintained.The force now exerted on the string is

Gravity is an attractive force between

If you double the mass of an object while an unbalanced force remains constant,

From the equation w = mg, it is apparent that weight is a (an)

A boy on a skateboard pushes off the ground with his foot.He and the skateboard accelerate down the sidewalk due to the force

The attractive force a 70-kg person exerts on Earth is much, much smaller than the force Earth exerts on the person.

The mass of a 100-N sack of seed is closest to

A cannon ball and a bowling ball were dropped at the same time from the top of a building.At the instant before the balls hit the sidewalk, the cannon ball has greater

What Is Science

Energy

Heat and Temperature

Wave Motions and Sound

Electricity

Light

Atoms and Periodic Properties

Chemical Bonds

Chemical Reactions

Water and Solutions

Organic Chemistry

Nuclear Reactions

The Universe

The Solar System

Earth in Space

Rocks and Minerals

Plate Tectonics

Building Earths Surface

Shaping Earths Surface

Geologic Time

The Atmosphere of Earth

Weather and Climate

Earths Waters

Filters