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WorksheetsMotion and forces
Total questions: 75
Worksheet time: 3hrs 30mins
What is the unit for force?
N (Newtons)
lbs (pounds)
g (grams)
m/s (meters per second)
When will the forces of gravity between two objects be the GREATEST?
when the masses of both objects are small and the objects are far apart
when the masses of both objects are large and the objects are close together
when the masses of both objects are small and the objects are close together
when the masses of both objects are large and the objects are far apart
Friction always
(a) opposes the motion
(b) helps the motion
(c) doesn't really affect the motion
(d) speeds up the motion
The more streamlined an object is, the ________.
more air resistance
less air resistance
slower air resistance
faster air resistance
Why would person B have a harder time moving down the hill?
Person B has more friction than person A.
Person B has the same friction as person A.
Person B is out of shape.
Person B has less friction has person A.
Is it balanced?
Yes, it will move to the right
No, it will not move
yes, it will not move
no, it will move to the right
What is the net force?
0N
10N right
10N left
5N right
The force of gravity pulling on an object determines the object's _______.
mass
weight
distance
acceleration
Which model has the greater or stronger gravitational attraction?
Model A
Model B
Both Model A and Model B (same gravity)
Rough surfaces have _________
greater friction
less friction
the same level of friction
no friction
Calculate the net force of the object in the image shown.
20N Left
35N Left
5N Left
5N Right
A person not paying attention while skateboarding hits a rock. The skateboard stops, the person does not. Which law explains why the person did not stop?
1st Law: The Law of Inertia
2nd Law: F=ma
3rd Law: Every action has an equal and opposite reaction
Rockets are launched into space using jet propulsion. The exhaust coming out from the rocket pushes down on the ground. The ground pushes up on the rocket with an equal, but opposite force. Which law is being demonstrated by this?
1st Law: The Law of Inertia
2nd Law: F=ma
3rd Law: Every action has an equal and opposite reaction.
Which has more Inertia? (so you need more force to move)
Truck
A wheel barrow
A cat
A skateboard
Which of Newton's Laws says that an object in motion will remain in motion unless acted on by a force?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which of Newton's Laws says that objects with greater mass require more force to accelerate them?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which of Newton's Laws says that for every action, there is an equal but opposite reaction?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which of Newton's Laws explains why you can throw a tennis ball at a wall and it bounces back?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which of Newton's Laws explains why it's harder to push a wagon full of rocks rather than an empty wagon?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which of Newton's Laws is also called the law of inertia?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
When the net force on an object is NOT zero N, the forces are...
balanced
unbalanced
Balanced forces on an object mean that the object's motion...
WILL change.
will NOT change.
If Miss McCarthy is dragging a heavy box across the floor with 5 N of force, and the frictional force is 3 N, what is the net force on the box?
0 N
8 N
2 N
6 N
If Miss McCarthy is playing tug-o-war with her sister, and each of them pulls on the rope with 20 N of force, then...
the net force is 40 N and the forces are balanced.
the net force is 40 N and the forces are unbalanced.
the net force is 0 N and the forces are balanced.
the net force is 0 N and the forces are unbalanced.
What is the difference between mass and weight?
Nothing. They are not related.
Mass is how much "stuff" something is made of, and weight is how much gravity pulls on that "stuff".
Weight is how much "stuff" something is made of, and mass is how much gravity pulls on that "stuff".
Mass is how heavy something is, and weight is how much "stuff" something is made of.
A person pushes a bowling ball 10 meters and then pushes a tennis ball 10 meters. Which push requires more force and why?
The bowling ball because it has less acceleration
The tennis ball because it has a greater acceleration
The bowling ball because it has a greater mass
The tennis ball because it has less mass
The moon has a smaller mass than Earth. How does the moon's gravity compare to Earth's gravity?
The moon's gravity is greater than Earth because the moon has more mass.
The moon's gravity is less than Earth because he moon has less mass.
The moon and Earth's gravity are the same because gravity is a constant force.
The moon does not have gravity because it is in outer space.
Which law of motion?
It is harder to push a full grocery cart than an empty grocery cart.
1st Law - Law of Inertia
2nd Law - Law of Acceleration
3rd Law - Law of Action/Reaction
Law of Gravity
Which law of motion?
A car stops suddenly. The crash test dummies are thrown forward through the windshield because they don't have their seatbelts on.
1st law - Law of Inertia
2nd Law - Law of Acceleration
3rd Law - Law of Action/Reaction
Law of Gravity
A ball is rolled across four different surfaces with the same force. Which surface will slow the movement of the ball the most?
tile floor
carpet road
grassy field
cement sidewalk
Which one of the following objects has the greatest momentum?
ping pong ball
a golf ball
a soft ball
a bowling ball
Which of the following is an example of increasing friction intentionally?
waxing skies
adding grease to gears on a bike
throwing sand on an icy driveway
putting polish on the table
A feather will fall through the air more slowly than a brick because of _____.
Air resistance
Gravity
Inertia
Momentum
What is a force that works in the opposite direction AGAINST MOTION?
Force
Motion
Gravity
Friction
How hard gravity pulls on an object determines its __.
mass
weight
volume
positions
How hard an object is to stop.. It is greater when the object has a greater mass or greater speed.
velocity
momentum
balanced force
gravity
The model shows forces acting on a box when it is sliding down the ramp.
What would most likely happen to the motion of the box if you poured oil on the ramp?
It will slow the box because the force of friction will be increased.
It will speed up the box because the force of friction will be increased.
It will slow the box because the force of friction will be reduced.
It will speed up the box because the force of friction will be reduced.
A student drew the model car shown for a class project.
What was he most likely trying to model?
The speed of a car
The forces acting on a car
The distance a car might move
The things that change the size of the car
If an unbalanced force acts on an object at rest, the object will move in the direction of the force. Which of the following best models an object with unbalanced forces acting on it?
The arrows in the diagrams shown represent the size and direction of the forces that are acting on a cart. Different forces were applied to carts. The mass of each cart is the same.
If the carts started at rest, which one would speed up the most in a direction to the right of the page?
The planet Jupiter has much more mass than Earth. What is the weight of an astronaut who lands on Jupiter?
The astronaut would weigh more on Jupiter than on Earth
The astronaut would weigh somewhat less on Jupiter than on Earth
The astronaut would have the same weight on Jupiter as on Earth
The astronaut would be weightless on Jupiter
Person pulling on the left = 45 N
Person pulling on the right = 32 N
What is the net force?
zero N
10 N
77 N
13 N
What will happen if you were to drop a 16 lb steel marble and a 16 ounce cork onto the floor from the same height and at the same time in a vacuum?
The steel marble will land first.
The cork marble will land first.
Both the steel marble and the cork marble will land at the same time.
When you slide a box across the floor, what force must your push be stronger than?
Support Force
Friction Force
Gravity
Air resistance
2. By changing the surface over which the car rolls from sandpaper to wax paper, you might be able to test the effect of what force?
A. Magnetism
B. Wind
C. Wind
D. Friction
7. A ball is sitting loose in the fast moving wagon pictured below. If the wagon stops suddenly, the ball will
A. stop immediately with the wagon
B. fly forward off the wagon
C. both the wagon would crash but the ball would remain in the wagon
D. the ball would fall to the side
During an experiment, students applied an equal force to push each box pictured below. If they pushed all of the boxes on the same surface for same amount of time, which box will MOST LIKELY move the greatest distance?
F. 30 kg
G. 15 kg
H. 150 kg
J. 40 kg
9. Some students were testing the effects of force on the motion of a water bottle. They set up the experiment picture above and rolled the full water bottle down both ramps. What question were the students most likely trying to answer?
A. How does mass affect the distance a full water bottle will roll?
B. How does friction affect the distance a full water bottle will roll?
C. How does the size of the water bottle affect the distance it rolls?
D. How does ramp slope affect the distance a full water bottle will roll?
A book weighing 3 kg is pushing on the table with 2 N of force. What is the table doing? And why does the book not move?
There are no forces acting on the book
The table pushes up with 3 N. All forces are balanced
Gravity is the only force acting on the book. All forces are balanced
Friction is opposing it so the forces are unbalanced so no movement.
What is the resultant force (Net Force) for this object?
6N to the right
4N to the left
14N to the left
The object will not move
A car crashes in to a tree with a momentum of 500 N. 450 N are transferred to the tree, 30 are transferred to the ground and ___ are transferred as sound.
50
20
100
none
A test car crashes into into a wall. Scientists want to know how the energy/momentum is transformed or transferred. The car hits the wall with a force/momentum of 10,000 N. Their sensors detect that 1,000 N was transformed into sound waves and 1,000 N was transformed into heat by friction. How much of the momentum/energy was transferred to the wall?
10,000 N.
8,000 N
1,000 N
5,000 N
