An object will only accelerate if acted on by ________________ forces.
unbalanced
100
When calculating net force, if two forces are acting in the SAME direction, then you ____________ those forces.
add
100
An object's resistance to a change in motion is called ____. Objects want to keep doing what they're already doing.
inertia
100
Mass = 20 kg
Acceleration = 7 m/s^2
Force = ?
140 N
100
On a graph, what axis is the dependent variable always located on?
Y-axis
200
Objects with more ______ require more force to accelerate.
mass
200
If the net force acting on an object is 0, then we say the forces acting on the object are _________________.
balanced
200
The force that resists the motion between two objects in contact with one another.
friction
200
It took Mary 20 minutes to walk 10 kilometers. What is her average speed in km/min?
0.5 km/min
200
Which of these objects has the most inertia: a car, a train, or a bike?
Train
300
What units are used for acceleration?
m/s^2
300
Work is being done on an object if the object ___________ due to a force.
moves
300
You know work is only done on an object if the object _____.
moves
300
Force = 240 N
Acceleration = 8 m/s^2
Mass = ?
30 kg
300
Which of these is an example of a measurement of velocity?:
A) 10 m/s B) 43 kilometers North
C) 25 meters south D) 17 mph West
D) 17 mph West
400
Forces always occur in pairs. For every action, there is a reaction of ___________ strength in the ___________ direction.
equal; opposite
400
When calculating net force, if two forces are acting in OPPOSITE directions then you ______________ those forces.
subtract
400
Acceleration is defined as a ___________ in direction or speed.
change
400
It took Heather 30 minutes to drive 15 miles North to Prosper. What is her average velocity in miles per hour?
30 mph North
400
The force which prevents objects from 'falling' into whatever it is they are sitting upon. It is always perpendicular to the surface with which an object is in contact.
Normal Force
500
Objects with more mass have more ____________ and therefore require more force to accelerate.
inertia
500
An object will NOT accelerate if the net force acting on it is _______.
zero
500
The distance and direction an object travels in a certain amount of time.
velocity
500
Force= 15 N
Mass = 2.5 kg
Acceleration =
6 m/s^2
500
The force that attracts a body toward the center of the earth, or toward any other physical body having mass.