Quiz about 9th Contact Force Quiz

Question 1

Which scenario best demonstrates an example of Newton's first law of motion?

Accepted Answer

A car passenger moves forward when a car suddenly stops.

Answer

A shopping cart accelerates when it is pushed.

Answer

A rocket lifts off from a launch pad.

Answer

A man pushes a canoe off the shore and into the water.

Question 2

The table shows the acceleration due to gravity on four different planets. What planet is a person standing on if the person has a mass of 85.0 kg and weighs 305 N?

Accepted Answer

Mercury

Answer

Mars

Answer

Venus

Answer

Earth

Question 3

Which object has a mass of 15 grams?

Accepted Answer

Y

Answer

V

Answer

W

Answer

X

Question 4

What is the mass of object Z?

Accepted Answer

9 grams

Answer

7 grams

Answer

11 grams

Answer

13 grams

Question 5

Which object has the smallest mass?

Accepted Answer

V

Answer

W

Answer

X

Answer

Z

Question 6

Which object would require the least amount of force to move?

Accepted Answer

A. V

Answer

B. W

Answer

C. Y

Answer

D. Z

Question 7

Which explanation BEST supports Newton's second law of motion which states that force = mass x acceleration?

Accepted Answer

C. Object Y will require the most force to move because it has the largest mass.

Answer

A. Object Y will accelerate the fastest because it has the largest mass.

Answer

B. Object V will accelerate the slowest because it has the smallest mass.

Answer

D. Object V will require the most force to move because it has the smallest mass.

Question 8

The drawings show four objects that are acted upon by different forces. The arrows represent the forces' direction, and the forces' units are in newtons (N). Based on Newton's law of inertia, which object is moving at a steady speed, assuming that all four objects are moving on a frictionless surface?

Accepted Answer

Object 4

Answer

Object 1

Answer

Object 2

Answer

Object 3

Question 9

Which car traveled the greatest distance in the shortest time according to the graph?

Accepted Answer

Car A

Answer

Car B

Answer

Car C

Answer

Car D

Question 10

Which car had the slowest speed according to the graph?

Accepted Answer

Car C

Answer

Car A

Answer

Car B

Answer

Car D

Question 11

The speed of a fifth car, labeled Car E, is increasing from 0 second to 50 seconds, traveling a total distance of 250 m. Which graph BEST represents the motion of Car E?

Accepted Answer

Graph D: A curve that starts flat and becomes steeper.

Answer

Graph A: A straight line with a constant slope.

Answer

Graph B: A curve that starts steep and levels off.

Answer

Graph C: A line that rises and then becomes flat.

Question 12

A ball is rolled across a floor under two different conditions. Each time the ball is rolled, it starts out at the same speed. Explain how the results support Newton's first law, which states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

Accepted Answer

The results support the idea that frictional force is what causes the ball to slow and come to a stop. Without the frictional force acting on the ball, the ball would be able to keep rolling.

Answer

The results support the idea that frictional force is what causes the ball to change direction. Without the frictional force acting on the ball, the ball would be able to keep rolling.

Answer

The results support the idea that frictional force is what causes the ball to begin rolling. Without the frictional force acting on the ball, the ball would not be able to start rolling.

Answer

The results support the idea that frictional force is what causes the ball to change direction. Without the frictional force acting on the ball, the ball would not be able to start rolling.

Question 13

Three unbalanced forces were applied to two blocks, A and B. The graphs show the force applied and the acceleration of each block. Which best describes the masses of block A and block B?

Accepted Answer

Block A has half as much mass as block B.

Answer

Block A has twice as much mass as block B.

Answer

Block A has a quarter as much mass as block B.

Answer

Block A has four times as much mass as block B.

Question 14

Which of the following correctly describes the object's motion?

Accepted Answer

The object is moving with constant velocity.

Answer

The object is moving with increasing acceleration.

Answer

The object is moving with constant acceleration.

Answer

The object is moving with increasing velocity.

Question 15

Assuming the force acting on the objects is constant, which claim about inertia and acceleration is supported by the data?

Accepted Answer

An object with a higher mass has more inertia which causes it to speed up less quickly.

Answer

An object with a lower mass has less inertia which causes it to speed up less quickly.

Answer

An object with a lower mass has more inertia which causes it to speed up more quickly.

Answer

An object with a higher mass has less inertia which causes it to speed up more quickly.

Question 16

A car travels 40 miles north in the first 40 minutes of a trip. The same car travels 30 miles west in the next 30 minutes of the trip. What can be said about the motion of the car?

Accepted Answer

The car is traveling at a constant speed.

Answer

The car is accelerating at a constant rate.

Answer

The car is decreasing its speed.

Answer

The car is moving at a constant velocity.

Question 17

Jose sets up an investigation to determine the effect of force on mass. First, he rolls a 100-gram ball down a ramp and hits the back of a parked 50-gram car. He measures the distance the car moved. Next, he rolls the 100-gram ball down the same ramp and hits the back of a parked 100-gram car. He measures the distance the car moved. Which of the following is most likely to be the result of Jose's experiment?

Accepted Answer

The 50-gram car moved farther than the 100-gram car.

Answer

The 100-gram car moved farther than the 50-gram car.

Answer

Both cars moved the same distance.

Answer

Neither car moved any distance.

Question 18

A student is performing an investigation. She applies the same amount of force to a soccer ball and a volleyball and observes their acceleration. She records her data in the table. The student claims that a bowling ball with a mass of 0.5 kg will accelerate faster than the volleyball and the soccer ball. Which statement BEST evaluates the student's claim?

Accepted Answer

The student's claim is incorrect because acceleration decreases as mass increases.

Answer

The student's claim is correct because acceleration decreases as mass increases.

Answer

The student's claim is correct because acceleration increases as mass increases.

Answer

The student's claim is incorrect because acceleration increases as mass increases.

Question 19

Based on Keshaun's data, how is the acceleration of an object maintained as the mass of an object increases?

Accepted Answer

by adding more force to an object with a higher mass

Answer

by adding more force to an object with a lower mass

Answer

by adding less force and then more force to an object with a lower mass

Answer

by adding less force and then more force to an object with a higher mass

Question 20

Megan left her wagon outside while it was raining and it filled with water. When Megan tried to move the wagon that afternoon, she failed to budge the wagon. Why did Megan's wagon become hard to move?

Accepted Answer

The rainwater increased the mass of the wagon, increasing the amount of force needed to move it.

Answer

The rainwater decreased the force of gravity pushing on the wagon, increasing the force needed to move it.

Answer

The rainwater decreased the force of friction pulling on the wagon, decreasing the force needed to move it.

Answer

The rainwater increased the mass of the wagon, decreasing the amount of force needed to move it.

Question 21

The girl on the sled will remain in motion unless

Accepted Answer

she is stopped by an outside force.

Answer

her motion is changed by magnetic forces.

Answer

she accelerates at a constant speed.

Answer

the force of friction forcer her to move faster.

Question 22

Which law describes this picture?

Accepted Answer

Newton's First Law

Answer

Newton's Second Law

Answer

Newton's Third Law

Question 23

A car is driving at a constant velocity of 75 m/s on the highway headed to Tucson, on a windy day. What is the force acting upon it to continue it's state of motion?

Accepted Answer

0 N, due to "the constant velocity" which means the car is already moving. It does not need force to continue it's state of motion.

Answer

Really? This question again? Obviously it is 75 m/s because of one of Newton's Laws.

Answer

Wait, I do know, I just don't know how to explain it. But, It is one of the laws... right?

Answer

75 N to the right, due to action and reaction, as well as inertia.

Question 24

When a horse stops suddenly, the rider on its back continues to move forward onto the ground. Which law is this?

Accepted Answer

Newton's 1st Law of Motion

Answer

Newton's 2nd Law of Motion

Answer

Newton's 3rd Law of Motion

Question 25

It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes

Accepted Answer

Newton's second law, the law of acceleration

Answer

Newton's first law, the law of inertia

Answer

Newton's third law, the law of action reaction

Answer

The law of universal gravitation

Question 26

What is required to change the velocity of an object?

Accepted Answer

An unbalanced force

Answer

Gravity

Answer

A balanced force

Answer

Inertia

Question 27

When applying a force of 10 N to a mass of 2 kg, what is the acceleration of the mass? (Use the formula $$a = \frac{F}{m}$$ )

Accepted Answer

5 m/s2

Answer

20 m/s2

Answer

10 m/s

Answer

5 m/s

Question 28

Will it take more force to push an empty shopping cart or a shopping cart that is full?

Accepted Answer

The full shopping cart

Answer

The empty shopping cart

Answer

They will take the same amount of force

Question 29

What happens to the acceleration of an object if the force applied to it is doubled while its mass remains constant?

Accepted Answer

The acceleration is doubled.

Answer

The acceleration is halved.

Answer

The acceleration remains the same.

Answer

The acceleration is quadrupled.

Question 30

Which of the following scenarios best illustrates Newton's third law of motion?

Accepted Answer

A rocket launching into space.

Answer

A ball rolling down a hill.

Answer

A book resting on a table.

Answer

A car accelerating on a highway.

Question 31

Which scenario best demonstrates Newton's first law of motion?

Accepted Answer

A book remains at rest on a table until it is pushed.

Answer

A car accelerates when the driver presses the gas pedal.

Answer

A ball rolling on a flat surface comes to a stop due to friction.

Answer

A rocket launches into space due to the expulsion of gas.

9th Contact Force Quiz

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