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WorksheetsForce and Motion Review
Total questions: 28
Worksheet time: 24mins
Read the statements below and identify the direction and net force of the object. A box is being pulled by two people to the right. One person is pulling with a force of 6N and the other person is pulling with a force of 3N. The box will move with a net force of ___ to the ___.
9N, right
6N, left
3N, right
0N, no movement
A group of students was handed these 5 flashcards displayed. The students were then asked to identify how many of the flashcards are examples of balanced forces acting on an object. Based on the examples given, which of the flashcards represents balanced forces acting on an object? Choose TWO correct answers.
A plane is traveling in a straight line at a constant speed.
A car increases its speed from 20 m/s to 35 m/s.
A runner is traveling on a curve during a race.
A rock is at rest on the side of a busy highway.
A truck traveling at 65 mph slams on its brakes.
The diagram shows a car moving to the right with a force of 35 newtons while the wind is blowing to the left with a force of 15 newtons. What is the net force acting on the car? Enter the correct answer in the box.
20 N
50 N
15 N
35 N
A student stands on a skateboard as the skateboard remains in place. When the student pushes his foot against the ground, the skateboard moves forward. The harder he pushes against the ground, the faster the skateboard moves. A friend jumps on for a ride, and the skateboard slows down. The student must push even harder to get the skateboard moving again. Once they get going, they hit a curb. The skateboard stops moving, but the students fly onto the grass. Fortunately, everyone is fine.
Which of the following describes an instance where unbalanced forces influenced the skateboard?
The skateboard accelerates down a slope due to gravity.
The skateboard moves at a constant speed on a flat surface.
The skateboard is at rest on a flat surface.
The skateboarder applies a force to stop the skateboard.
A student stands on a skateboard as the skateboard remains in place. When the student pushes his foot against the ground, the skateboard moves forward. The harder he pushes against the ground, the faster the skateboard moves. A friend jumps on for a ride, and the skateboard slows down. The student must push even harder to get the skateboard moving again. Once they get going, they hit a curb. The skateboard stops moving, but the students fly onto the grass. Fortunately, everyone is fine.
Describe one instance in the above paragraph where the skateboard was under the influence of balanced forces. Identify the primary forces involved, and explain why they were balanced.
When the skateboard is at rest on a flat surface.
When the skateboard is accelerating downhill.
When the skateboard is turning a corner.
When the skateboard is moving at a constant speed on a flat surface.
Which of the following are indicators that an object is experiencing balanced forces? Select TWO correct answers.
An object is changing its direction.
An object is moving at a constant speed.
An object is stationary (Not Moving).
An object is speeding up.
An object is slowing down.
When a car is on an icy roadway, it isn't easy to control its motion. Which of the following forces is responsible for this motion?
balanced force
equal force
unbalanced force
Newton's force
A car starts to skid on an icey road. Why is this due to an unbalanced force. Which statement BEST supports this answer?
The spinning force of the tires pushes the car in the opposite direction.
The input force exceeds the output force.
The ice supplies an unbalanced force to the car's tires.
The icy road does not supply enough friction to the car's tires.
Based on the available data in the table above, which of the following conclusions can be made about the amount of force used by each student during the race? Select TWO correct answers.
Student B used the most force.
Student D used the least force.
Student A used more force than Student E.
Student C used less force than Student A.
Newton's 3rd law of motion is summarized as action-reaction. For every action, there is an equal, but opposite reaction. This law is best demonstrated by -
a baseball flying through the air
a ball being dropped from the roof of a building
going forward in your seat after the brakes are applied quickly
the air rushing out of a balloon, causing it to move across the room
Four students push carts with sports equipment across the gym. Each student pushes with the same amount of force. Which cart has the greatest change in acceleration?
12 tennis racquets, m = 10 kg
15 sports balls, m = 15 kg
18 exercise mats, m = 20 kg
When a car suddenly stops at a red light, a book lying on the car seat slides forward. Why does the book continue to move forward when the car stops?
The book loses its backward force.
The book's inertia causes it to continue moving.
The friction of the braking transfers energy to the book.
The car moves in reverse more rapidly than the book.
A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 Newtons (N). If resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s²? Calculate your answer. Be sure to use the correct place value.
18 m/s²
10 m/s²
15 m/s²
12 m/s²
A person is riding a scooter and hits a large rock. Which statement best describes how Newton's 1st Law of Motion applies to this situation?
The scooter will move backward due to the force of the rock.
The scooter will move sideways around the rock.
The person will move backward due to the force of the rock on the scooter.
The person will move forward due to the force of his inertia.
If a force of 50 N is applied to each of the three objects, which one will have the LEAST acceleration?
Object X, because it has the greatest mass
Object Y, because it has the least volume
Object Z, because it has the least mass
Object Z, because it has the greatest volume
The diagram shows a cart being pushed with a force of 25N. The force causes the cart to move at a constant speed of 3 m/s. What will happen if the force is increased to 35N?
The cart will move at a constant speed of 13 m/s.
The speed of the cart will not change.
The speed of the cart will increase.
The speed of the cart will increase by 10 m/s.
A student uses a magnet to move a 0.025 kg metal ball. The magnet exerts a force of 5N, which causes the ball to begin moving. What is the acceleration of the ball when it begins to move?
200 m/s²
0.125 m/s²
5 m/s²
5.025 m/s²
How much force is needed to accelerate a 3 kg plastic train at a rate of 1.5 m/s²? Round your answer to the nearest tenth.
4.5 N
3.0 N
6.0 N
1.5 N
Match the following laws of motion to their pictures
1st Law: Inertia
2nd Law: F=ma
3rd Law: Action/Reaction
Match the following
unless acted on by an unbalanced force, an object at rest stays at rest and an object in motion stays in motion at a constant velocity; unbalanced forces cause an object to accelerate (change direction or speed).
1st Law of Motion
greater net force causes a greater acceleration for a given mass. For two objects with the same net force, the object with the greater mass accelerates less than the object with less mass.
2nd Law of Motion
states that when one object applies a force to a second object, the second object applies an equal and opposite force to the first object.
3rd Law of Motion
Which Newton's law does this picture represent
Newtons 1st law
Newtons 2nd law
Newtons 3rdt law
an object at rest stays at rest unless acted on by an unbalanced force
law of inertia
a soccer ball will not move unless it is kicked
force = mass x acceleration
law of acceleration
A full grocery cart requires more force to push than an empty cart
For every action there is an equal and opposite reaction
Law of Action-Reaction
A swimmer pushes back on the water and moves forward
N
Newton
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Impulse
(a) is a force that always resists the relative motion of objects or
surfaces.
The forces acting on the car are (a) . The direction of the movement of the car will be (b) .
The forces acting on the cart are (a) , causing the cart to move to the (b) __
One day Juana decided to take her dog Peblito on a walk. When Juana put Peblito’s leash on his collar, Peblito immediately began pulling on the leash. When Peblito pulled, he was putting a(n)
(a)
force on the leash. Juana pulled back on the leash so Peblito would stay still. Juana’s pull and Peblito’s pull were equal, so the two forces were
(b)
. Then, Peblito pulled so hard that Juana dropped the leash. Peblito’s pull was so hard that the forces on the leash were
(c)
, and he was able to run away.
