Force
The SI unit of force is the _________
Newton
According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail
A Disappears into the wood
B exerts an equal force back on the hammer
C moves at a constant speed
D creates a friction with the hammer
exerts an equal force back on the hammer
When you know both the speed and direction of an object's motion, you know the
average speed of the object
acceleration of the object
distance the object has traveled
velocity of the object
velocity of the object
The force that one surface exerts on another when the two rub against each other is called
Friction
According to Newton's second law of motion, the acceleration of an object equals the net force action on the object divided by the object's
Mass
velocitymomentum
weight
Mass
one way to increase acceleration is by
decreasing force
increasing mass
decreasing mass
increasing both force and mass proportionally
increasing mass
When a pair of balanced forces acts on an object, the net force that results is
Equal to zero
Newton's third law of motion describes
Net Force
centripetal forces
balanced forces
action and reaction forces
balanced forces
speed is the ratio of the distance an object moves
the displacement of the object
the motion of the object
the amount of time needed to travel the distance
the direction the object moves
the amount of time needed to travel the distance
When an unbalance force acts on an object,
A. the objects motion does not change
B the inertia of the object increasesC the weight of the object decreases
D the object accelerates
The object accelerates
For every action, there is an equal but opposite reaction is
Newtons second law of motion
Newton's third law of motion
Newton's First law of Motion
The Law of Conservation of Momentum
Newton's Third Law of Motion
if a bicyclist travels 30 kilometers in two hours, her average speed is________
60 km/h
2km/h
30km/h
15km/h
15km/h
Which of the following is an example of exerting a force?
A. a train speeding down a track
B a carpenter hammering a nail
C. a child running through a field
D. an airplane soaring through the sky
A Carpenter hammering a nail
A stack of books on the desk remains motionless. Which of Newton's Laws best describes this behavior?
Newton's first law of motion
Newton's second law of motion
newtons third law of motion
None of these
Newton's First Law of Motion
speed equals distance divided by___________
velocity
motion
size
time
time