What is Force?
The amount of force needed to cause a mass of 1 kilogram to accelerate at 1 m/s² is __________.
1 N
True or False: Forces are always balanced when they act on an object in the same direction.
False
True or False: If opposing forces are unequal in strength, the net force is less than zero.
False
True or False: When two forces act on an object in the same direction, the net force equals zero.
False
True or False: Whenever an object is stationary, it has no forces acting on it.
False
True or False: Mass is a measure of the force of gravity on an object.
False
How is net force calculated when two forces act on an object in opposite directions?
The net force is calculated by subtracting the lesser force from the greater force.
True or False: Every sport involves forces.
True
True or False: The SI unit for weight is the newton.
True
True or False: Two forces acting in the same direction always result in a stronger force.
True
True or False: When forces act in opposite directions on an object, they are subtracted to yield the net force.
True
True or False: Most objects have at least two forces acting on them at all times.
True
What is the force that a person or thing exerts on to an object?
applied force
Examples of forces include a. motion. b. friction. c. acceleration. d. two of the above
b. friction
What are forces that produce a net force of zero?
balanced forces
If gravity pulls you down toward the center of Earth with a force of 500 N, how much upward force does the ground exert on you? a. 0 N b. 50 N c. 500 N d. none of the above
c. 500 N
Force can cause a a. stationary object to start moving. b. moving object to change speed. c. moving object to change direction. d. all of the above
d. all of the above
What is the push or pull acting on an object?
force
Whenever the motion of an object changes, __________ has been applied.
force
Give an example of a force.
gravity
How a force affects an object's motion depends on the strength of the force and the __________ of the object.
mass
What is the combination of all the forces acting on an object?
net force
What is the SI unit for force?
newton
If force is represented by an arrow, the length of the arrow represents the __________ of the force.
strength
When two forces act on an object in the same direction, the net force equals the __________ of the two forces.
sum
When unequal and opposite forces act on an object, the forces are said to be __________.
unbalanced
What are the forces that produce a net force greater than zero?
unbalanced forces
Force is a(n) __________ because it has both size and direction.
vector
