WorksheetsCopy of Science 8.6C
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
1.
4 lines
2.
2.
a)
F
b)
G
c)
H
d)
J
3.
3. A researcher observes a car speeding up from rest. The researcher records data about the car and the car's motion.
Which data points can be used to calculate the net force that was acting on the car when it was speeding up?
Select TWO correct answers
a)
The car's mass is 1,000 kg.
b)
The car's speed increased for 7 seconds.
c)
The car started from rest.
d)
The car's acceleration was 4 meters per second squared.
e)
The car traveled a total of 300 m.
4.
4.
This question has two parts.
A player hits a baseball with a baseball bat.
Part A
Which statement about the forces between the ball and the bat is correct?
a)
A The force of the ball on the bat was less than the force of the bat on the ball.
b)
B The force of the ball on the bat was equal to the force of the bat on the ball.
c)
C The force of the ball on the bat was greater than the force of the bat on the ball.
5.
4.
Part B
Which statement BEST supports the answer to Part A?
a)
A Whenever two objects interact, the more massive object always applies a greater force than the less massive object.
b)
B Whenever two objects interact, the faster object always applies a greater force than the slower object.
c)
C Whenever two objects interact, they always apply equal and opposite forces on each other.
d)
D Whenever two objects interact, their forces always combine and are applied in the direction of the object that is moving the fastest.
6.
5.
a)
A Action: The force of the bird on the wires Reaction: The force of the wires on the fence post
b)
B Action: The force of the wires on the wires Reaction: The force of the bird on the fence post
c)
C Action: The force of the fence post on the bird Reaction: The force of the bird on the wires
d)
D Action: The force of the bird on the fence post Reaction: The force of the fence post on the bird
7.
6. When a coin is tossed in the air, it travels upward, gradually slows down, momentarily reaches zero speed, then moves back downward with increasing speed. Which statement best explains this change in the coin's motion?
a)
F The force of gravity causes the coin to change its velocity.
b)
G The coin's inertia decreases on the way up and increases on the way down.
c)
H The action-reaction force pair of gravity and the applied force cancel each other.
d)
J The coin remains in its state of upward motion until the force of friction acts upon it.
8.
7.
a)
A Because of friction, the ball continues rolling forward at the same speed.
b)
B Because of friction, the ball rolls forward at an increased speed.
c)
C Because of inertia, the ball continues rolling forward at the same speed.
d)
D Because of inertia, the ball rolls forward at an increased speed.
9.
8.
a)
F The wall pushes on the skater when the skater pushes on the wall.
b)
G The wheels slow down, and the skater stops.
c)
H The skater exerts a force on the wall, and the wheels exert a force on the floor and begin to turn.
d)
J The friction of the floor decreases when the wheels roll on the floor.
10.
9. A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?
a)
A There are no forces acting on the rock.
b)
B The only force acting on the rock is directed toward the sidewalk.
c)
C The forces acting on the rock are all balanced.
d)
D The sidewalk exerts an unbalanced force on the rock.
11.
10.
A pitcher throws a ball toward a player holding a softball bat. The player uses the bat to hit the ball. The bat applies a 10-newton force to the ball.
Which statement correctly describes the reaction force between the bat and ball?
a)
F The reaction force is the force that causes the ball to move toward the bat.
b)
G The reaction force is the force applied to the bat by the player holding the bat.
c)
H The reaction force is the force that pulls the ball toward the ground.
d)
J The reaction force is the force of the ball on the bat
12.
11.
a)
A the aerialist’s feet and the rope
b)
B the rope and the balancing bar
c)
C the two ends of the rope
d)
D the aerialist’s arms and legs
13.
12. Four boxes are sliding with constant speed before each box experiences an unbalanced force of 8 N. Which box would experience the greatest acceleration when the unbalanced force is applied?
a)
F The box with a mass of 2 kg
b)
G The box with a mass of 4 kg
c)
H The box with a mass of 6 kg
d)
J The box with a mass of 8 kg
14.
13.
a)
A destroys the force
b)
B exerts a stronger downward force
c)
C causes the load to accelerate upward
d)
D exerts an upward force that is equal to the downward force
15.
14.
a)
F The box accelerates at 1.0 m/s2 to the right because the net force is 17 N to the right.
b)
G The box accelerates at 1.9 m/s2 to the right because the greater force is to the right.
c)
H The box accelerates at 3.0 m/s2 because the combined forces cause the box to accelerate.
d)
J The box does not accelerate, because neither force is large enough to move the box.
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