Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?

a. The ball would not roll up the other plane at all.b. To nearly its original height

c. To about one quarter its original heightd. To nearly twice its original heighte. To nearly half its original height

Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?

a. The ball would not roll up the other plane at all.b. To nearly its original heightc. To about one quarter its original heightd. To nearly twice its original heighte. To nearly half its original height

Friction is a force that always acts

a. perpendicular to an object's motion.b. opposite to an object's motion.c. in the same direction as an object's motion.

Friction is a force that always acts

a. perpendicular to an object's motion.b. opposite to an object's motion.c. in the same direction as an object's motion.

The law of inertia states that an object

a. will continue moving at the same velocity unless an outside force acts on it.b. will continue moving in a straight line unless an outside force acts on it.c. that is not moving will never move unless a force acts on it.d. at rest will remain at rest unless acted on by an outside force.e. will do all of the above.

The law of inertia states that an object

a. will continue moving at the same velocity unless an outside force acts on it.b. will continue moving in a straight line unless an outside force acts on it.c. that is not moving will never move unless a force acts on it.d. at rest will remain at rest unless acted on by an outside force.e. will do all of the above.

The law of inertia applies to a. objects at rest.b. moving objects.c. both moving and nonmoving objects.

The law of inertia applies to a. objects at rest.b. moving objects.c. both moving and nonmoving objects.

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

a. zero, since no force is necessary to keep it moving.b. twice the force with which it was firedc. one half the force with which it was fired.d. the same amount of force with which it was fired.e. one quarter the force with which it was fired.

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

a. zero, since no force is necessary to keep it moving.b. twice the force with which it was firedc. one half the force with which it was fired.d. the same amount of force with which it was fired.e. one quarter the force with which it was fired.

If the force of gravity suddenly stopped acting on the planets, they would

a. spiral slowly towards the sun.

b. continue to orbit the sun.c. move in straight lines tangent to their orbits.d. spiral slowly away from the sun.e. fly straight away from the sun.

If the force of gravity suddenly stopped acting on the planets, they would

a. spiral slowly towards the sun.

b. continue to orbit the sun.c. move in straight lines tangent to their orbits.d. spiral slowly away from the sun.e. fly straight away from the sun.

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. The reason this can be done is that

a. gravity pulls very hard on the milk carton.b. the milk carton has very little weight.c. the milk carton has inertia.

d. none of the above

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. The reason this can be done is that

a. gravity pulls very hard on the milk carton.b. the milk carton has very little weight.c. the milk carton has inertia.d. none of the above

The force required to maintain an object at a constant speed in free space is equal to

a. the mass of the object.b. the weight of the object.c. zero.d. the force required to stop it.

e. none of the above

The force required to maintain an object at a constant speed in free space is equal to

a. the mass of the object.b. the weight of the object.c. zero.d. the force required to stop it.

e. none of the above

One object has twice as much mass as another object. The first object also has twice as much

a. velocity.b. gravitational acceleration.c. inertia.d. all of the above

One object has twice as much mass as another object. The first object also has twice as much

a. velocity.b. gravitational acceleration.c. inertia.d. all of the above

Compared to its weight on Earth, a 10-kg object on the moon will weigh

a. the same amount.b. less.c. more.

Compared to its weight on Earth, a 10-kg object on the moon will weigh

a. the same amount.b. less.c. more.

Compared to its mass on Earth, the mass of a 10-kg object on the moon is a. the same.b. more.c. less.

Compared to its mass on Earth, the mass of a 10-kg object on the moon is a. the same.b. more.c. less.

You would have the largest mass of gold if your chunk of gold weighed 1 N on a. Earth.b. Jupiter.c. the moon.

You would have the largest mass of gold if your chunk of gold weighed 1 N on a. Earth.b. Jupiter.c. the moon.

Which has more mass, a kilogram of feathers or a kilogram of iron?

a. The feathersb. The ironc. Neither—they both have the same mass.

Which has more mass, a kilogram of feathers or a kilogram of iron?

a. The feathersb. The ironc. Neither—they both have the same mass.

An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass?

a. The one on Earthb. The one on the moonc. They have the same mass.d. Not enough information to say

An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass?

a. The one on Earthb. The one on the moonc. They have the same mass.d. Not enough information to say

You and a friend are jumping on a trampoline. Why does Earth, which is rapidly orbiting around the sun, not move under your feet when you jump?

a. There are different rules in space and on the surface of the earthb. Newton’s first law holds that your body moves along with Earth because it is not compelled to change its motion by an unbalanced force.c. Newton’s second law holds that the acceleration produced by the force of gravity is offset by the force of friction on your feet.d. Newton’s third law holds that there is an equal and opposite force exerted by the trampoline on your feet, which allows you to move with Earth through space.

You and a friend are jumping on a trampoline. Why does Earth, which is rapidly orbiting around the sun, not move under your feet when you jump?

a. There are different rules in space and on the surface of the earthb. Newton’s first law holds that your body moves along with Earth because it is not compelled to change its motion by an unbalanced force.c. Newton’s second law holds that the acceleration produced by the force of gravity is offset by the force of friction on your feet.d. Newton’s third law holds that there is an equal and opposite force exerted by the trampoline on your feet, which allows you to move with Earth through space.

A pencil lies on your desk. If the Earth is moving around the sun at a speed of 30 km/s, how fast is the pencil moving relative to the desk? How fast is the pencil moving relative to the sun?

a. 0 km/s; 0 km/sb. 0 km/s; 30 km/sc. 30 km/s; 30 km/sd. There is not enough information to answer these questions.

A pencil lies on your desk. If the Earth is moving around the sun at a speed of 30 km/s, how fast is the pencil moving relative to the desk? How fast is the pencil moving relative to the sun?

a. 0 km/s; 0 km/sb. 0 km/s; 30 km/sc. 30 km/s; 30 km/sd. There is not enough information to answer these questions.

Speed is

a. a measure of how fast something is moving.b. always measured in terms of a unit of distance divided by a unit of timec. the distance covered per unit time.d. all of the above.e. none of the above.

Speed is

a. a measure of how fast something is moving.b. always measured in terms of a unit of distance divided by a unit of timec. the distance covered per unit time.d. all of the above.e. none of the above.

One possible unit of speed is

a. miles per hour.b. light years per century.c. kilometers per hour.d. all of the above.e. none of the above.

One possible unit of speed is

a. miles per hour.b. light years per century.c. kilometers per hour.d. all of the above.e. none of the above.

When you look at the speedometer in a moving car, you can see the car's a. average distance traveled.b. instantaneous acceleration.c. average speed.d. instantaneous speed.e. average acceleration.

When you look at the speedometer in a moving car, you can see the car's a. average distance traveled.b. instantaneous acceleration.c. average speed.d. instantaneous speed.e. average acceleration.

Suppose you take a trip that covers 550 km and takes 5 hours to make. Your average speed is

a. 55 km/h.b. 110 km/h.c. 160 km/h.d. 20 km/h.e. 2750 km/h.

Suppose you take a trip that covers 550 km and takes 5 hours to make. Your average speed is

a. 55 km/h.b. 110 km/h.c. 160 km/h.d. 20 km/h.e. 2750 km/h.

Acceleration is defined as the CHANGE in

a. time it takes to move from one place to another place.b. velocity of an object.c. distance divided by the time interval.d. velocity divided by the time interval.e. time it takes to move from one speed to another speed.

Acceleration is defined as the CHANGE in

a. time it takes to move from one place to another place.b. velocity of an object.c. distance divided by the time interval.d. velocity divided by the time interval.e. time it takes to move from one speed to another speed.

Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?

a. You and the car are accelerating.b. Your acceleration is constantly changing.c. Your velocity is constant.d. Your direction is constantly changing.e. Your speed is constant.

Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?

a. You and the car are accelerating.b. Your acceleration is constantly changing.c. Your velocity is constant.d. Your direction is constantly changing.e. Your speed is constant.

A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car’s average acceleration?

a. 0.17 m/s2

b. 1.67 m/s2

c. 6 m/s2

d. 7 m/s2

e. none of the above

A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car’s average acceleration?

a. 0.17 m/s2

b. 1.67 m/s2

c. 6 m/s2

d. 7 m/s2

e. none of the above

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car’s acceleration?

a. 5 km/h·sb. 10 km/h·sc. 35 km/h·sd. 40 km/h·se. 45 km/h·s

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car’s acceleration?

a. 5 km/h·sb. 10 km/h·sc. 35 km/h·sd. 40 km/h·se. 45 km/h·s

A car accelerates at 2 m/s2. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 20 m/s?

a. 2 secondsb. 10 secondsc. 20 secondsd. 40 secondse. none of the above

A car accelerates at 2m/s2. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 20 m/s?

a. 2 secondsb. 10 secondsc. 20 secondsd. 40 secondse. none of the above

What is the Average speed of swimmer C in kilometers per min?What is swimmers A’s average speed during the time period of 10 min to 20 min.?

A) What is acceleration

B) IF the speed of a car is a constant 20 m/s, then why is a car accelerating as it rounds a curve? (Explain answer in terms of direction, velocity, and acceleration)

It is now 10:29 AM but when the bell rings at 10:30AM David will be late for Science Class for the third time this week. He must get from one side of the school to the other by hurrying down three different hallways. He runs down the first hallway, a distance of 35.0m, at a speed of 3.5m/s. The second hallway is filled with students, and he covers its 48.0m length at an average speed of 1.2m/s. The final hallway is empty, and David sprints its 60.0m length at a speed of 5.00m/s

A)Does David make it to class on time or does he get detention form being lat again? (If David does make it on time, by how much time does he make it to class early. Or if David does not make it on time, how late is he for class.)

B)Draw a distance vs time graph of the situation.