Which statement BEST describes the motion of car D?

The car moves at a steady speed for 10 seconds and then remains at a steady speed for the remainder of the time.

The car’s speed increases for 10 seconds and then the car stops moving for the remainder of the time.

The car moves at a steady speed for 10 seconds and then stops moving for the remainder of the time.

The car’s speed decreases for 10 seconds and then remains at a steady speed for the remainder of the time.

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?

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

Graph A: A straight line with a constant slope.

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

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

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.

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.

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.

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.

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.

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?

Block A has half as much mass as block B.

Block A has twice as much mass as block B.

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

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

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

The object is moving with constant velocity.

The object is moving with increasing acceleration.

The object is moving with constant acceleration.

The object is moving with increasing velocity.

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

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

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

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

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

While at soccer practice, Abbey runs down the field at 10 meters per second. She has a constant speed and does not change direction. What is Abbey's acceleration?

The acceleration is 0 m/s² because her velocity did not change.

The acceleration is 10 m/s² because her velocity increased.

The acceleration is 0 m/s² because her velocity increased.

The acceleration is 10 m/s² because her velocity did not change.

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?

The car is traveling at a constant speed.

The car is accelerating at a constant rate.

The car is decreasing its speed.

The car is moving at a constant velocity.

Rosa claims that the force needed to accelerate an object is proportional to the mass of the object. Which statement BEST supports or disproves Rosa’s claim using the data from the table?

Rosa’s claim is false. Even though the mass and the force increase in each trial, the acceleration of the object remains the same.

Rosa’s claim is false. When the mass of the cart increases by 1.0 kg, the force on the cart increases by more than 1.0 kilogram.

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?

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

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

Both cars moved the same distance.

Neither car moved any distance.

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?

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

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

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

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

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

by adding more force to an object with a higher mass

by adding more force to an object with a lower mass

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

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

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?

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

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

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

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

The girl on the sled will remain in motion unless

she is stopped by an outside force.

her motion is changed by magnetic forces.

she accelerates at a constant speed.

the force of friction forcer her to move faster.

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?

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.

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

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

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

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

Newton's second law, the law of acceleration

Newton's first law, the law of inertia

Newton's third law, the law of action reaction

The law of universal gravitation

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

They will take the same amount of force

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

The acceleration remains the same.

The acceleration is quadrupled.

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

A car accelerating on a highway.

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

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

A car accelerates when the driver presses the gas pedal.

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

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

9th Contact Force Quiz

Authored by LISA FLETCHER

Science

9th Grade

NGSS covered

Used 14+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

A shopping cart accelerates when it is pushed.

A rocket lifts off from a launch pad.

A car passenger moves forward when a car suddenly stops.

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

Answer explanation

A car passenger moves forward when a car suddenly stops, illustrating Newton's first law: an object in motion stays in motion unless acted upon by an external force. The passenger's inertia causes them to lurch forward.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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?

Mars

Mercury

Venus

Earth

Answer explanation

To find the planet, use the formula: weight = mass × gravity. Given weight (305 N) and mass (85.0 kg), gravity = 305 N / 85.0 kg = 3.59 m/s². This matches Mercury's gravity, confirming the person is on Mercury.

Which object has a mass of 15 grams?

Answer explanation

Object Y has a mass of 15 grams, making it the correct choice among the options provided. The other objects V, W, and X do not have this mass.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mass of object Z?

7 grams

9 grams

11 grams

13 grams

Answer explanation

The mass of object Z is 9 grams, as it is the only option that fits the criteria provided in the question. The other choices, 7 grams, 11 grams, and 13 grams, do not match the correct answer.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which object has the smallest mass?

Answer explanation

Object V has the smallest mass among the options provided. This conclusion is based on a comparison of the mass values associated with each object.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

A. V

B. W

C. Y

D. Z

Answer explanation

Object V requires the least amount of force to move, likely due to its lighter weight or lower friction compared to the other options. Thus, it is the easiest to move.

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

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

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

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

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

Answer explanation

Choice C best supports Newton's second law because it correctly states that a larger mass (Object Y) requires more force to achieve acceleration, aligning with the formula: force = mass x acceleration.

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9th Contact Force Quiz

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

A car passenger moves forward when a car suddenly stops, illustrating Newton's first law: an object in motion stays in motion unless acted upon by an external force. The passenger's inertia causes them to lurch forward.

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?

To find the planet, use the formula: weight = mass × gravity. Given weight (305 N) and mass (85.0 kg), gravity = 305 N / 85.0 kg = 3.59 m/s². This matches Mercury's gravity, confirming the person is on Mercury.

Which object has a mass of 15 grams?

Object Y has a mass of 15 grams, making it the correct choice among the options provided. The other objects V, W, and X do not have this mass.

What is the mass of object Z?

The mass of object Z is 9 grams, as it is the only option that fits the criteria provided in the question. The other choices, 7 grams, 11 grams, and 13 grams, do not match the correct answer.

Which object has the smallest mass?

Object V has the smallest mass among the options provided. This conclusion is based on a comparison of the mass values associated with each object.

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

Object V requires the least amount of force to move, likely due to its lighter weight or lower friction compared to the other options. Thus, it is the easiest to move.

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

Choice C best supports Newton's second law because it correctly states that a larger mass (Object Y) requires more force to achieve acceleration, aligning with the formula: force = mass x acceleration.

Object 4 is moving at a steady speed because it is not acted upon by any net force, according to Newton's law of inertia. This means it maintains its state of motion on a frictionless surface.

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

Car A traveled the greatest distance in the shortest time, as indicated by its steepest slope on the graph, representing the highest speed compared to the other cars.

Which car had the slowest speed according to the graph?

According to the graph, Car C had the lowest speed compared to the other cars. This is evident as its speed value is the least among Car A, Car B, and Car D, confirming that Car C is the correct answer.

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