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Worksheets7th grade Review for Midterm
Total questions: 41
Worksheet time: 2hrs 3mins
When you slide a box across the floor, what force does your push have to be greater than in order for there to be emotion.
Normal force
Gravitational force
Air resistance force
Frictional force
What makes a good reference point?
Something that is in constant motion
Something that is acceleration
Something that is stationary (not moving)
Something that is decelerating
What causes a change in an object's motion?
Balanced forces
Acceleration
Unbalanced forces
In the picture, what force is acting upward on the skydiver?
Gravity
Air resistance
In the picture, what force is acting downward on the skydiver?
Gravity
Air resistance
What is the Net Force on the box shown below?
12N upward
12N downward
23N to the right
17N to the left
17N to the right
During a baseball game, a hitter strikes the ball with a bat. When this happens, the ball and the bat exert a force on each other. Why does the ball accelerate away from the bat more than the bat accelerates away from the ball?
The ball has greater velocity before the collision, so the force affects the ball more than it affects the bat.
The bat exerts more force than the ball because the batter is exerting a force on the bat as it hits the ball.
The ball has less mass, so the equal force on the ball and the bat causes greater acceleration of the ball.
Which term is an example of force?
Energy
Mass
Weight
Work
Motion is the process of changing position.
True
False
How long did it take the sea turtle to travel 12 km?
4 days
7 days
1 day
3 days
Which of the following are an example of acceleration? CHOOSE ALL THAT APPLY :)
A car traveling at 55 km/hr
A motorcycle turning left at 4 m/s.
A bike applying its brakes to slow down.
A plane changing speed upon lift-off.
A dog jogging at 5 m/s.
Select the correct unit of measurement for Force.
Joules
Isaacs
Newtons
meters per second
Friction will cause an increase in
negative acceleration
positive acceleration
speed
gravity
What is the net force shown in the free body diagram?
0 Newtons stationary
3 Newtons left
2 Newtons right
8 Newtons right
Which arrow represents normal force?
The arrow pointing east.
The arrow pointing west.
The arrow pointing down.
The arrow pointing up.
Does the free body diagram demonstrate:
Unbalanced forces
Balanced forces
Newton's 3rd Law states that for every action there is an unequal and opposite reaction. True or False?
True
False
Newton's 2nd law states:
Force= Mass X Inertia
Force= Mass X Acceleration
Acceleration= Mass X Force
Part of Newton's 1st law of motion states that an object in motion will stay ___________.
At rest.
in motion.
static.
in friction.
Harry applies 40 N of force to a book he's reading in order to lift it up with an acceleration of 10 m/s2. What is the mass of the book? (Mass=Force/Acceleration)
100kg
20kg
4kg
5kg
If Sam wants to lift a weight with a mass of 50 kg at an acceleration of 2 m/s2, how much force will he need?
(Force=Mass X Acceleration)
100N
50N
25N
2N
If a 2 kg ball is thrown at a force of 10 N how fast is its acceleration? (Acceleration = Force/Mass)
20m/s2
10m/s2
5m/s2
2m/s2
Force is needed....
for a moving object to keep moving at the same speed and direction
for a moving object to change it's speed
for a motionless object to remain still
to prevent an object from turning.
Force is needed.....
for a moving object to keep moving at the same speed and direction
for a moving object to change direction
for a motionless object to remain still
to prevent a moving object from turning
What does the strength of gravity between two objects depend upon?
mass & distance
mass & weight
gravity & inertia
inertia & mass
Energy is the ability to..
use gravity
hold objects
cause change
A moving truck has more __________ energy than a parked car
potential
kinetic
sound
A large truck parked on a hill has more __________ energy than a car parked next to it.
kinetic
potential
sound
What type of energy moves from warmer objects to cooler objects?
thermal
nuclear
sound
electrical
What type of energy is carried by an electric current?
nuclear
electrical
sound
thermal
What type of energy is the total kinetic and potential energy in an object?
nuclear
radiant
thermal
mechanical
The kinetic energy of an object depends on its _________ and ___________
friction & mass
speed & work
mass & speed
height & work
The gravitational potential energy of an object depends on its mass and ___________.
speed
height
friction
work
What type of energy is stored in food and matches?
chemical
light
heat
nuclear
A candle produces light energy and what other type of energy?
radiant
thermal
nuclear
chemical
