WorksheetsNewton's Laws and Forces Final Recap
Total questions: 15
Worksheet time: 8mins
If you were in a spaceship and fired a cannonball into frictionless space, the amount of force needed to keep the cannonball in motion would be ____.
zero, since no force is necessary to keep an object moving
equal to the force with which it was fired
more than the force with which it was fired
less than the force with which it was fired
An object is moving along a level surface with a constant velocity. The net force acting upon the object is _____.
in the direction of motion
opposite the direction of motion
zero
... none of these can be determined without further information.
A rightward moving object is coasting to a stop along a straight, level surface. The net force acting upon the object MUST be ____.
directed rightward
directed leftward
zero
... impossible to answer without further information.
Analyze the free body diagram and determine which of the following statements is true of this rightward-moving object?
This object weighs 1000 N.
The object has a mass of 100 kg.
The acceleration is leftward.
The acceleration is rightward.
A free-falling object is an object ____.
which has reached a terminal velocity.
upon which the force of air resistance is equal to the force of gravity
upon which gravity is the only force
None of these appropriately complete this sentence.
A quiet moment during a test is interrupted as a physics book falls from a table and strikes the floor. The reaction force to the force of the floor pushing upwards on the book (when it hits the ground) is ____.
the force of the Earth pulling the book downwards
the force of the book upon itself
the force of the floor pushing down on the Earth
the force of the book pushing down on the floor
A large truck rear-ends a less massive car at a stop sign. The force of the truck on the car is _____ the force of the car on the truck.
greater than
less than
equal to
A box is being accelerated across a level surface. A force is being applied to the box in an upward and rightward direction (as shown below). In this situation, the normal force is ____ the force of gravity.
greater than
less than
equal to
A box is being accelerated across a level surface. A force is being applied to the box in an upward and a rightward direction (as shown below). This force makes an angle of 30 degrees with the horizontal. If the angle at which the force is exerted is increased to 45 degrees, then the normal force would ____.
increase.
decrease.
stay the same.
A box is being accelerated across a level surface. A force is being applied to the box in an upward and a rightward direction (as shown below). This force makes an angle of 30 degrees with the horizontal. If the angle at which the force is exerted is increased to 45 degrees, then the friction force would ____.
increase.
decrease.
stay the same.
The forces acting upon an object are BALANCED. Therefore, one can be absolutely certain that the object ____.
is at rest
is moving and moving with a constant velocity
has a velocity of 0 m/s
is not accelerating
A 10-kg object is moving to the right at a constant velocity of 4 m/s. Which one of the following horizontal forces is required to maintain this state of motion?
0 N
2.5 N
40 N
none of these.
Which section is experiencing the greatest net force? (Hint: this will be where there is the greatest acceleration.)
Section 1
Section 2
Section 3
All are the same.
Three equal magnitude forces act on the box shown. The is one upward force, one downward force, and one rightward force. Which of the following statements must be true based on this information?
- The box must have a rightward component of velocity.
- The box has no vertical component of velocity.
- The acceleration of the box is directed to the right.
- The velocity of the box is changing with time.
1 and 2 only
1 and 3 only
3 and 4 only
1 and 4 only
Susan gently pushes the tip of her finger against the eraser and the pencil does not move. Which of the following figures best illustrates the interaction of forces between Susan's finger and her pencil?
