WorksheetsSCI.8.6A
Total questions: 26
Worksheet time: 13mins
How will this object act in response to these forces?
The object will remain at rest.
The object will move upward only.
The object will move to the right only.
The object will move upward and toward the right.
If the car in the diagram rolls faster and faster as it moves down the ramp, you can be sure that
there is no friction acting on the object.
the forces acting on it are unbalanced.
the net force on the car is 0 N.
only gravity is acting on the car.
Which correctly compares the motion of object A and object B, based on the information in the graphs? Assume that the scales on the x and y axes of these graphs are identical.
Object A moved more quickly than object B.
Object A and object B moved in the same direction.
Object A was stationary but object B moved.
Object A moved more slowly than object B.
Based on the information in the diagram, what will happen next?
The flag on the rope will be pulled to the right.
Both teams will be pulled toward the center.
The flag on the rope will be pulled to the left.
Both teams will be pushed away from the center.
A student uses a magnet to move a .04 kg ball bearing. The magnet exerts a force of 4N, which causes the ball bearing to begin moving. What is the acceleration of the ball bearing when it begins to move?
.01 m/s2
.16 m/s2
3.96 m/s2
100 m/s2
What is the net force on the box in the diagram?
10 N to the left
5 N to the right
5 N to the left
0 N
Look at the drawing shown. Which force (N), when placed to the right of the ball in the drawing, would cause the ball to move right?
2 N
7 N
12 N
17 N
The diagram shows a luggage cart being pushed by one person. Just a few minutes ago, he had someone else helping him push the cart. The two of them pushed with a force of 35 N, which caused the cart to move at a constant speed of 5 m/s. What is likely to happen now that the person is pushing the cart himself?
The speed of the cart will decrease.
The speed of the cart will not change.
The cart will come to a complete stop.
The speed of the cart will decrease to 4 m/s.
Which object in the diagram above is acted on by a net force of 5 N to the right?
object A
object B
object C
object D
A force gives energy to an object, causing it to move, stop moving, or change its direction. The graph shows the motion of a car. In the period shown on the graph, the car moved in one direction only.During what period were unbalanced forces acting on the car?
0–13 seconds
0–3 seconds
3–13 seconds
2–4 seconds
The graphs show the motion of four different objects. Each object moved in a single direction during the time period shown in the graph. Which of the objects were acted on by unbalanced forces?
objects B, C, and D only
objects B and D only
object B only
object A only
Which object was acted on by balanced forces during the time period shown on the graph?
object A
object B
object C
object D
Each of these cars moved in single direction during the time shown in the graph. Which car was acted on by balanced forces for the entire time shown in the graph?
1
2
3
4
Applying a force to an object may take energy, but it does not always result in work being done. What must be true for work to be done?
The object must have a sizeable mass.
The object must move in the direction opposite that of the force applied.
The object must move in the same direction in which the force is being applied.
The object must accelerate so that it attains its maximum speed as quickly as possible.
Objects can move in a variety of ways, but they all need a force to make them move. Study the forces acting on the box. What question could be investigated using this experimental set-up?
What is the average speed of the box’s motion?
How is energy changed from one form to another?
How is energy changed from one form to another?
How do unbalanced forces affect motion?
What is the net force acting on the rope?
20 N to the left
1,080 N to the right
0 N
20 N to the right
Based on the information in the diagram, what is the net force acting on this object?
12 N downward
4 N upward
4 N downward
8 N to the left
A change in an object's velocity always indicates that
unbalanced forces are acting on the object.
the object has no inertia.
magnetic forces are acting on the object.
balanced forces are affecting the object's motion.
While practicing in a simulator, an astronaut with a mass of 65 kg experienced a net force of 1820 N. What acceleration did the astronaut experience?
.036 m/s2
28 m/s2
1755 m/s2
118,300 m/s2
Which diagram shows forces that would result in the box moving to the right?
diagram A
diagram B
diagram C
diagram D
A ball sitting at the top of a hill gets pushed, rolls down the hill, rolls through a patch of grass at the base of the hill, and comes to a stop. At what point are balanced forces acting on the ball?
when the ball is at rest in the patch of grass
when the ball gets pushed and begins moving
when the ball is rolling down the hill, going faster and faster
when the ball is rolling through the patch of grass, going slower and slower
When a car suddenly stops moving, its passengers continue moving forward due to
pressure.
gravity.
nertia.
riction.
If you roll a ball across the floor, it will slow down and eventually stop due to —
friction
gravity
positive acceleration
negative acceleration
Astudent is riding a bicycle at a speed of 10 km per hour. After reaching the desired destination, the student applies the brakes of the bicycle, causing the bicycle to slow and then stop. The force that causes the bicycle to change its speed is —
friction
gravity
magnetism
acceleration
Which describes an object being acted on by balanced forces
a car moving in a straight line at a constant speed
a school bus that is slowing down
a bicycle going around a corner
a train that is speeding up
What change always indicates that unbalanced forces are acting on an object?
a change in the object's motion
a change in the object's mass
a change in the object's color
a change in the object's density
