Objective #6

Determine the kinetic energy of a 20.0 kg bicycle that is moving with a speed of 10.0 m/s. 2000 J 200 J 4000 J 400 J 1000 J

1000 J

A baseball player bats a ball with a force of 1000 N. The reaction force that the ball exerts against the bat is less than 1000 N. impossible to determine. 1000 N. more than 1000 N.

1000 N.

Determine the kinetic energy of a 10.0 kg bicycle that is moving with a speed of 20.0 m/s. 1000 J 2000 J 4000 J 400 J 200 J

2000 J

Determine the kinetic energy of a 10.0 kg bicycle that is moving with a speed of 20.0 m/s. 200 J 2000 J 1000 J 400 J 4000 J

2000 J

Which takes more work - lifting a 10 lb sack of fertilizer 3 feet in 3 s, or lifting it 2 feet in 2 s? 3 feet in 3 s 2 feet in 2 s both take the same amount of work

3 feet in 3 s

A karate chop delivers a blow of 3000 N to a board that breaks. The force that acts on the hand during this event is 6000 N. 1500 N. 3000 N. zero.

3000 N.

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope? zero 400 N none of these 800 N 600 N

400 N

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope? zero 800 N none of these 600 N 400 N

400 N

A person is attracted toward the center of the Earth by a 500-N gravitational force. The Earth is attracted toward the person with a force of 250 N. zero. 1000 N. 500 N.

500 N.

The double pan balance we used in the lab will also give us an accurate measure of mass in outer space. True False

False

The metric unit for work is the ___________. Joule Watt kilogram m/s/s Newton

Joule

The inertia balance we used in the lab will also give us an accurate measure of mass on the moon. True False

True

The spring scales we use in our lab will also give an accurate measure of weight in outer space. True False

True

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the Mack truck. Volkswagen. same for both.

Volkswagen.

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the Volkswagen. same for both. Mack truck.

Volkswagen.

An archer shoots an arrow. Consider the action force to be exerted by the bowstring against the arrow. The reaction to this force is the grip of the archer's hand on the bow. arrow's push against the bowstring. air resistance against the bow. friction of the ground against the archer's feet. combined weight of the arrow and bowstring.

arrow's push against the bowstring.

Arnold Strongman and Suzie Small each pull very hard on opposite ends of a massless rope in a tug-of-war. The greater force on the rope is exerted by Suzie, surprisingly. both the same, interestingly enough. Arnold, of course.

both the same, interestingly enough.

You hold a ball motionless in your hand. The force of your hand pushing up on the ball is ________________ the force of the earth pulling down on the ball. greater than equal to less than

equal to

You hold an a ball motionless in your hand. The force of your hand pushing up on the ball is ________________ the force of the ball pushing down on your hand. greater than equal to less than

equal to

You hold an apple motionless in your hand. The force of your hand pushing up on the apple is ________________ the force of the apple pushing down on your hand. greater than equal to less than

equal to

You hold an apple motionless in your hand. The force of your hand pushing up on the apple is ________________ the force of the apple pushing down on your hand. less than equal to greater than

equal to

You hold an apple motionless in your hand. The force of your hand pushing up on the apple is ________________ the force of the earth pulling down on the apple. greater than equal to less than

equal to

You hold a ball in your hand. As you toss it upward, the force of your hand pushing up on the ball is ________________ the force of the earth pulling down on the ball. less than equal to greater than

greater than

When the mass of a moving object is doubled, its kinetic energy... is divided by four. does not change. is quadrupled. is cut in half. is doubled.

is doubled.

When the speed of a moving object is doubled, its kinetic energy... is cut in half. is doubled. is divided by four. does not change. is quadrupled.

is quadrupled.

When the speed of a moving object is doubled, its kinetic energy... is doubled. is cut in half. is divided by four. is quadrupled. does not change.

is quadrupled.

When the speed of a moving object is doubled, its kinetic energy... is quadrupled. is cut in half. is doubled. does not change. is divided by four.

is quadrupled.

Compared to the weight of an object on the earth, its weight on the moon is zero. less than on the earth, but greater than zero. the same as on the earth. more than on the earth.

less than on the earth, but greater than zero.

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? air resistance the diver encounters while falling water resistance that will soon act upward on the diver the attraction to the planets, stars, and every particle in the universe all of these\ none of these

none of these

As a ball falls, the action force is the pull of the Earth's mass on the ball. The reaction force is the acceleration of the ball. air resistance acting against the ball. pull of the ball's mass on the Earth. none of these

pull of the ball's mass on the Earth.

A car and a much heavier truck collide. The car is moving much faster than the heavier truck when they collide. Each puts a force on the other one. The force of the truck on the car is ___________ the force of the car on the truck. greater than less than the same as need more information to decide

the same as

A car and a much heavier truck collide. The car is moving much faster than the heavier truck when they collide. Each puts a force on the other one. The force of the truck on the car is ___________ the force of the car on the truck. the same as need more information to decide less than greater than

the same as

A car and a much heavier truck collide. The car is standing still when the heavier truck hits it. Each puts a force on the other one. The force of the car on the truck is ___________ the force of the truck on the car. greater than less than the same as need more information to decide

the same as

A car and a much heavier truck collide. The car is standing still when the heavier truck hits it. Each puts a force on the other one. The force of the car on the truck is ___________ the force of the truck on the car. less than need more information to decide greater than the same as

the same as

A car and a much heavier truck collide. The heavier truck is moving much faster than the car when they collide. Each puts a force on the other one. The force of the car on the truck is ___________ the force of the truck on the car. greater than less than need more information to decide the same as

the same as

A car and a much heavier truck collide. The heavier truck is standing still when the car hits it. Each puts a force on the other one. The force of the truck on the car is ___________ the force of the car on the truck. less than greater than the same as need more information to decide

the same as

A car and a much heavier truck collide. The heavier truck is standing still when the car hits it. Each puts a force on the other one. The force of the truck on the car is ___________ the force of the car on the truck. less than need more information to decide the same as greater than

the same as

A car and a much heavier truck collide. They are both moving at the same speed when they collide. Each puts a force on the other one. The force of the truck on the car is ___________ the force of the car on the truck. less than the same as need more information to decide greater than

the same as

A small car breaks down out on the road and receives a push back to town by a large truck. While the truck, still pushing the car, is at cruising speed and continues to travel at the same speed, the force of the truck on the car is __________________ to the force of the car on the truck. greater than the same as less than need more information to decide

the same as

A small car breaks down out on the road and receives a push back to town by a large truck. While the truck, still pushing the car, is speeding up to get to cruising speed, the force of the truck on the car is __________________ to the force of the car on the truck. the same as less than need more information to decide greater than

the same as

Compared to the mass of an object on the earth, its mass in outer space where there is no net influence of gravity is zero. less than on the earth, but greater than zero. the same as on the earth. more than on the earth.

the same as on the earth.

Compared to the mass of an object on the earth, its mass on the moon is zero. less than on the earth, but greater than zero. the same as on the earth. more than on the earth.

the same as on the earth.

A automobile and a baby carriage traveling at the same speed collide head-on. The impact force is greater on the automobile. greater on the baby carriage. the same for both.

the same for both.

A automobile and a baby carriage traveling at the same speed collide head-on. The impact force is greater on the baby carriage. greater on the automobile. the same for both.

the same for both.

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is greater on the car. greater on the bug. the same for both.

the same for both.

In the top picture, a physics student is pulling upon a rope which is attached to a wall. In the bottom picture, the physics student is pulling upon a rope which is held by the Strongman. In each case, the force scale reads 500 Newtons. The physics student is pulling with more force when the rope is attached to the wall. with more force when the rope is attached to the Strongman. with the same force in each case. depends on how strong the rope is

with the same force in each case.