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WorksheetsT2W8 Revision Mechanics and Motion
Total questions: 56
Worksheet time: 3hrs 33mins
A freely falling object on Earth has a speed of 5.0 m s-1. After falling a further 20 m, its speed it
15 m s-1
20 m s-1
25 m s-1
45 m s-1
A ball is dropped from rest from a building 35.0 m high. If air resistance is neglected, then the ball will hit the ground with a speed of
8.4 m s-1
13.1 m s-1
18.5 m s-1
26.2 m s-1
A marble is dropped from the roof of a building and takes 3.2 s to reach the ground.
The approximate height of the building is
16 m
31 m
50 m
100 m
A girl dropped a stone into an empty well. She heard the sound of the stone hitting the bottom of the well after 4 seconds.
The depth of the well is about
20 m
40 m
80 m
160 m
The acceleration due to gravity on Mars is 3.7 m s-2.
If an object on Mars is launched vertically upwards with an initial speed of 40 m s-1, its speed after 3.0 s will be
11 m s-1
29 m s-1
36 m s-1
51 m s-1
Magnitude 139.0N
Magnitude 195N
Magnitude 139.0N
Magnitude 139.0N
Select the scalar quantities.
velocity
distance
energy
acceleration
speed
Jermaine runs exactly 2 laps around a 400 meter track. What is the displacement?
800
400
0
200
When adding two vectors graphically, a+b=c. Does b+a produce the same resultant vector c?
Yes, two vectors added together always produce the same resultant vector
No, because order matters
Yes, but c will be pointing in the opposite direction
No, because you can't add two vectors
Which vector equation matches the vector operation shown in the diagram below?
u + w = - v
v + u = w
w + u = v
- v + w = 2u
A ferry departs from A(-25, 28). It takes 3 hours to reach its destination B(20, -32), travelling in as straight line with constant velocity. Distances are in km. Find the distance that the ferry travels.
50 km
55 km
70 km
75 km
Kids pull on a wagon. As they pull there is a force acting
upon the wagon but not on the kid
upon the kid but not on the wagon
upon the kind and the wagon
Forces always occur
as single quantities
in pairs
by themselves
A dog plays with a ball. Consider the action force the dog touching the ball. What is the reaction force?
The friction of the ground on the ball.
The ball pushing the ground.
The ground pulling the dog.
The ball touching the dog.
A person is attracted towards the center of Earth by a 440N gravitational force. The force with which Earth is attracted toward the person is
More than 440N
Less than 440N.
The same, 440N.
An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is
larger.
the same.
smaller
need more information to say.
If a horse pulls on a wagon at rest, the wagon pulls back equally on the horse. Can the wagon be set into motion?
Yes, because there is a net force acting on the wagon.
Yes, because there is a time delay between action and reaction.
No, because the forces cancel each other.
Yes, because the horse's pull on the wagon is larger than the wagon's pull on the horse.
A large truck and a small car traveling at the same speed have a head-on collision. The vehicle to undergo the greater change in velocity will be
the small car
the large truck
neither, both are the same.
According to Newton's third law, if you push gently on something, it will push
gently on something else.
on you only if you aren't moving.
gently on you
on something only under the right conditions.
A rocket is able to accelerate in the vacuum of space when it fires its engines. The force that propels the rocket is the force
of the rocket on the exhaust gases.
of the exhaust gases on the rocket.
neither A nor B
A man pulls on a rope in a tug-of-war with an elephant . Each pulls with 500N of force. What is the tension in the rope?
0N
250N
25.0N
500N
You drive past a farm, and you see a cow pulling a plow to till a field. You have just learned about Newton’s third law, and you wonder how the cow is able to move forward if the plow is exerting an equal and opposite force on the cow. Which of the following explains the movement of the cow and plow?
The force exerted by the cow on the plow is equal to the force that the cow exerts on the ground to move forward.
The force exerted by the cow on the plow is larger than the force that the cow exerts on the ground to move forward.
The force exerted by the cow on the plow is smaller than the force that the cow exerts on the ground to move forward.
If your car runs out of gas, why can’t you push on the car’s windshield from the inside to move it?
In order for the car to move, a force must be exerted by you on the car’s windshield.
In order for the car to move, a force must be exerted by the car’s windshield on you.
In order for the car to move, an outside force must be exerted on the car.
In order for the car to move, a force must be exerted by the car on the ground.
In order to make a cart move forward, a horse must pull harder on the cart than the cart pulls on the horse.
TRUE
FALSE
A fighter hits a punching bag and brings it from rest up to a speed of 40 m/s in 0.08 s. What is the force of impact on the punching bag if its mass is 100 kg?
32.0 N
320 N
50,000 N
500 N
Consider the picture shown above. Which is an action-reaction pair?
A and C upon B, and B upon A and C
A upon B and B upon A
B upon C and A upon C
A, B, and C are action-reaction forces
A given force exerted on a large mass produces a greater acceleration than the same force exerted on a small mass.
TRUE
FALSE
If you exert a force of 12,000 N on a 3,000 kg car and a 6,000 kg truck that are both originally at rest, what will be the resulting accelerations of the objects?
The car and the truck will both accelerate 12,000 m/s^2.
The car will accelerate 1/4 m/s^2 and the truck will accelerate 1/2 m/s^2.
The car will accelerate 4 m/s^2 and the truck will accelerate 2 m/s^2.
The car will accelerate 36,000,000 m/s^2 and the truck will accelerate 72,000,000 m/s^2.
direction
Newton's 1st Law is also called the Law of ...
Friction
Inertia
Unbalanced forces
Newtons
What is the net force acting on this box?
8N to the right
5N to the left
5N to the right
9N to the left
What force causes objects that are moving to come to a stop?
gravity
inertia
friction
magnetism
The words "constant speed" in a problem means
the acceleration is 0 m/s2
the Net Force = 0 Newtons
All forces balance out
all of these
You are driving to a birthday party with the cake sitting in the passenger's seat. You slam on your brakes to avoid hitting a deer. This causes the cake to splatter all over your dashboard and the floor of the passenger's side. Which of Newton's Laws best explains why this happens?
Newton's First Law (Inertia)
Newton's Second Law (Net force = mass x acceleration)
Newton's Third Law (Action/Reaction)
Law of Universal Gravitation
Which of Newton's Laws quantify the relationship between external forces, an objects mass, and the rate that velocity changes?
Newton's First Law (Inertia)
Newton's Second Law (Net force = mass x acceleration)
Newton's Third Law (Action/Reaction)
Law of Universal Gravitation
A car with a velocity North encounters a force pushing it South. Ignoring all other factors, what will the motion of the car do?
speed up
slow down
stay at a constant speed
turn
A car with a velocity North encounters a force pushing it South. Ignoring all other factors, what will the motion of the car do?
speed up
slow down
stay at a constant speed
turn
A rubber ducky has a Net Force acting downward at the same time that it (the ducky) is moving downwards). The ducky will
slow down
speed up
stay at a constant speed
turn
Mrs. Frizzle is standing on a scale that is on the magical school bus. The bus is moving straight upward with a small constant speed. If Mrs. Frizzle weighs 850 Newtons when at rest in her classroom, how much does she weigh when on the bus?
850 Newtons
more than 850 Newtons
less than 850 Newtons
A child weighs 98 Newtons. What is the child's mass?
10 kg
20 kg
30 kg
40 kg
The net force on an object is 15 Newtons to the right. There are two forces acting on the object. One is 25 Newtons to the left while the other is
15 Newtons to the right
25 Newtons tot he right
40 Newtons to the right
10 Newtons to the right
There are two forces acting on a system. One is 30 Newtons to the right and the other is 70 Newtons also to the right. In order to put this system into equilibrium, there must also be a force of
100 Newtons to the left
40 Newtons to the left
100 Newtons to the right
40 Newtons to the right
Johnny has a mass of 75 kg. He sits on a desk. He is pushed with a force of 10 N. How quickly will he accelerate?
0.75 m/s/s
2 m/s/s
7.5 m/s/s
15 m/s/s
Calculate the acceleration a. (answer with the number and the unit only e.g. ' 1m/s/s ')
F= 250N
m=5kg
(a)
According to Newton's second Law, which would take more force to slow down?
The silver car
The green car
They would both take the same force
A golf ball and bowling ball are traveling with the same acceleration. Which one has more force?
golf ball
bowling ball
