concept 1
concept 2
concept 3
concept 4
100
Does changing the reference point affect the physical location of an object?
nope, just the distance and/or direction to get there
100
Give an example of a contact force
kicking a ball, friction, tension -- anything that involves two objects touching
100
True or false: all forces come in pairs
true
100
Give an example of a noncontact force
gravity, magnetic force, electrostatic force
200
What is used to represent a vector?
an arrow
200
If an object is at rest, what must you apply to the object in order for it to start moving?
a force
200
True or false: when an object applies a force to a second object, the second object accelerates in the opposite direction of the force
false
200
As the distance between two objects increases, the gravitational force between the two objects ____________.
decreases
300
What three things are needed to describe position?
reference point, distance, direction
300
What is acceleration?
a measure of the change in velocity during a period of time
300
The force that pushes perpendicular to the object's surface
normal force
300
As the mass of an object increases, the gravitational force between two objects _____________.
increases
400
during which time interval is the object moving back towards the starting point?
35-55 seconds
400
If a force of 10N is applied to a 2kg object, what will be the object's acceleration?
5m/s^2
400
What type of collision involves objects sticking together after they collide?
inelastic collision
400
What is gravitational acceleration on earth?
9.8m/s^2
500
total distance traveled AND the displacement of this object from 0-55 seconds?
total distance = 100 meters
displacement = 0 meters
500
Looking at the free body diagram, which direction is this object moving in?
towards the right
500
Explain the difference between force pairs and balanced forces
force pairs: two objects apply equal and opposite forces on each other, do not balance out because they're acting on two separate objects
balanced forces: equal and opposite forces are acting on a single object, balancing out to make a net force of 0 on an object
500
What is the weight of an object on earth if it has a mass of 10kg?
98N