Quiz about Physics Review

Question 1

A force is a -

Accepted Answer

push or pull

Answer

only a push

Answer

only a pull

Answer

none of the above

Question 2

How much force is needed to accelerate a 3kg skateboard 5m/s².

Accepted Answer

15N

Answer

8N

Answer

1.6N

Answer

0.6N

Question 3

How much force is needed to accelerate a 25kg bowling ball 2m/s².

Accepted Answer

50N

Answer

5N

Answer

12.5N

Answer

100N

Question 4

If a 2kg bird is pushed by the wind with a force of 2N, how much does the bird accelerate?

Accepted Answer

1m/s2

Answer

1m

Answer

2m/s2

Answer

4m/s2

Question 5

Newton's second law of motion describes the relationship between force, mass, and acceleration. Which of the following correctly describes this relationship?

Accepted Answer

All of the above

Answer

m=F/a

Answer

F=ma

Answer

a= F/m

Question 6

What is the acceleration of a 50kg object pushed with a force of 500 Newtons?

Accepted Answer

10m/s2

Answer

100m/s2

Answer

25,000m/s²

Answer

25m/s2

Question 7

A 50kg skater pushed by a friend accelerates 5m/sec². How much force did the friend apply?

Accepted Answer

250N

Answer

45N

Answer

15N

Answer

10N

Question 8

A force of 250N is applied to an object that accelerates at a rate of 5m/sec². What is the mass of the object?

Accepted Answer

50kg

Answer

100kg

Answer

1,250kg

Answer

5kg

Question 9

8th grade science classes are playing tug of war. Milburn's room pulls to the left with a force of 50N. Matte's room pulls to the right with a force of 45N. What is the net force? And who won?

Accepted Answer

5N left. Milburn's class won.

Answer

5N right. Matte's class won.

Answer

95N right. Matte's class won.

Answer

95N left. Milburn's class won.

Question 10

Which of the following correctly represents an unbalanced force?

Accepted Answer

While doing a mannequin challenge, Reed moves quickly to swat a bug that lands on his nose.

Answer

A book sitting on a desk.

Answer

A ball moving in a constant speed in the same direction.

Answer

A picture hanging on the wall in a classroom.

Question 11

Refer to the picture....balanced or unbalanced?

Accepted Answer

Unbalanced

Answer

Balanced

Question 12

What is the correct unit for FORCE?

Accepted Answer

N (Newtons)

Answer

lbs (pounds)

Answer

g (grams)

Answer

m/s² (meters per second squared)

Question 13

Refer to the image....Calculate the net force.

Accepted Answer

1N to the right

Answer

11N no motion

Answer

7N to the right

Answer

1N to the left

Question 14

Refer to the image... balanced or unbalanced?

Accepted Answer

Unbalanced

Answer

Balanced

Answer

Neither one

Answer

Both

Question 15

Which direction will the object move?

Accepted Answer

Left

Answer

Up

Answer

Down

Answer

Right

Question 16

Calculate the net force of the object.

Accepted Answer

5N left

Answer

10N left

Answer

2N right

Answer

15N right

Question 17

Refer to the image....calculate net force?

Accepted Answer

0N, no motion

Answer

50N, right

Answer

25N, left

Answer

5N, left

Question 18

Is this a balanced or unbalanced force?

Accepted Answer

Balanced

Answer

Unbalanced

Answer

Neither

Answer

Both

Question 19

A force that causes an object to move is ---

Accepted Answer

an unbalanced force.

Answer

a balanced force.

Answer

a massive force.

Answer

a strong force.

Question 20

The forces represented by the arrows in the diagrams are applied to the four objects that are at rest on a table. Which object is most likely to move to the right?

Accepted Answer

Object Y

Answer

Object W

Answer

Object X

Answer

Object Z

Question 21

A girl bowls with two different bowling balls. The masses of the balls are different. The green bowling ball has a mass of 16kg and the red bowling ball has a mass of 14kg. If the girl applies the same force on each of the bowling balls as she bowls, which bowling ball will have the least acceleration?

Accepted Answer

The green bowling Ball because it has more mass.

Answer

The red bowling Ball because it has less mass.

Answer

Both bowling balls will accelerate at the same rate.

Answer

There is not enough information provided to make an answer.

Question 22

A roller coaster that has three cars is accelerating at 15m/s². It comes to a quick stop at the end of the ride. If the mass of one roller coaster car is 200kg, how much force was needed to stop the roller coaster?

Accepted Answer

9,000N

Answer

45N

Answer

600N

Answer

6,000N

Question 23

Based on the image of the soccer players, what will be the result of the forces acting on the soccer ball?

Accepted Answer

The soccer ball will move to the left with a net force of 50N.

Answer

The soccer ball will not move.

Answer

The soccer ball will move right with a net force of 200N.

Answer

The soccer ball will move right with a net force of 50N.

Question 24

The three vehicles are all traveling at 15m/s.  Which vehicle is accelerating?

Accepted Answer

Pick up truck:  It is traveling on the curve of the road.

Answer

Minivan:  It is going a faster speed because it is in front.

Answer

Sedan:  It is approaching the minivan.

Answer

None of the vehicles are accelerating if their speed is constant.

Question 25

When all forces acting on this car are balanced, how will the motion of the car change?

Accepted Answer

There is no change in motion of the car.

Answer

There is a change in direction of the car.

Answer

The speed of the car increases.

Answer

The speed of the car decreases.

Question 26

Which of the toy cars has more force being applied to it?

Accepted Answer

Toy Car 4

Answer

Toy Car 1

Answer

Toy Car 2

Answer

Toy Car 3

Question 27

Sabrina pushes a rock with a force of 15 N, but it does not move. Determine the amount of resistance the rock exerts back on Sabrina?

Accepted Answer

The rock exerts 15 N of resistance.

Answer

The rock exerts no resistance.

Answer

The rock exerts a resistance less than 15 N.

Answer

The rock exerts a resistance greater than 15 N.

Question 28

When a car comes to a sudden stop, the people inside snap forward. Which law of motion explains why?

Accepted Answer

Law of Inertia

Answer

Law of Force and Acceleration

Answer

Law of Action-Reaction

Question 29

Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across a table to Student 2. If the force of friction resisting the student's push is 4 N, what is the net force acting on the board?

Accepted Answer

6 N

Answer

4 N

Answer

10 N

Answer

14 N

Question 30

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both are apply brakes at the same time to stop?

Accepted Answer

The car with the smaller mass will require less force to stop then the car with the larger mass.

Answer

The car with the larger mass will maintain its velocity while traveling down the hill.

Answer

The car with the smaller mass will take longer to stop than the car with the larger mass.

Answer

The car with the larger mass will have less inertial than the car with the smaller mass.

Question 31

The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table below.

Which vehicle has the greatest acceleration as it enters the highway?

Accepted Answer

Coupe

Answer

Sedan

Answer

SUV

Answer

Truck

Question 32

The diagram shows two different forces acting on a cyclist riding a bicycle.

The total mass of the cyclist and the bicycle is 100 kg. Based on this information, what is the acceleration of the cyclist?

Accepted Answer

.66m/s²forward, because the applied force is greater than the force of the air

Answer

.66m/s² backward, because the force of the air slows the cyclist down

Answer

2.3m/s² backward, because the forces are opposite and not equal

Answer

2.3m/s² forward, because the cyclist's inertia is greater than the force of the air

Question 33

For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table. Which of these best explains the student's data?

Accepted Answer

The speed of the cart increases as the art rolls down the ramp because the forces acting on the cart are unbalanced.

Answer

The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.

Answer

The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity.

Answer

The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.

Question 34

A student used a video camera to record another student dropping a marble through water in a graduated cylinder. The students watched the video in slow motion and made the observations shown.

During which part or parts of the marble's fall did the marble experience unbalanced forces?

Accepted Answer

parts 1 and 2 only

Answer

part 1 only

Answer

part 3 only

Answer

parts 2 and 3 only

Question 35

The diagram shows a homemade car being pushed with a force of 25 N.

The force causes the car to move at a constant speed of

3 m/s. What will happen if the force is changed to 35 N?

Accepted Answer

The speed of the car will increase.

Answer

The car will move at a constant speed of 13 m/s.

Answer

The speed of the car will not change.

Answer

The speed of the car will decrease to 1 m/s.

Question 36

Four students push carts filled with sports equipment across the gym. Each student pushes with the same amount of force. Which cart has the greatest change in speed?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 37

The list includes six situations.

Which objects in the list experience an unbalanced force?

Accepted Answer

The can, the swing, and the bird.

Answer

The book, the ball, and the car.

Answer

The ball, the car, and the bird.

Answer

The book, the ball, the can and the swing.

Question 38

A golfer hits a golf ball with a club. The mass of the ball is 0.05 kg. The ball accelerates at 2,000 m/s².

What is the net force, the the nearest Newton, that accelerates the ball?

Accepted Answer

100 N

Answer

40,000 N

Answer

1000 N

Answer

2.5 N

Question 39

Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown above. According to the data table, how much force is acting on the cart when the students measure an acceleration of 2.6 m/s².

Accepted Answer

13 N

Answer

7 N

Answer

8 N

Answer

12 N

Question 40

A tennis racket hits a tennis ball, exerting a different amount of force on the ball during a tennis game.

Which swing will make the tennis racket will have the greatest acceleration?

Accepted Answer

Swing A

Answer

Swing B

Answer

Swing C

Question 41

The diagram shows a boat moving north in a river at 3 m/s while the current in the river moves south at 1 m/s.

How will the boat be affected if it enters a part of the river where the current is moving south at 2 m/s?

Accepted Answer

The boat will move slower.

Answer

The boat will move faster.

Answer

The boat will stop.

Answer

The boat will move to the west.

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