Motion
What is the difference between speed and velocity?
Velocity includes direction
What is the unit of force?
Newton (full points)
or...
{kg*m}/s^2 (double points)
What is the energy of motion called?
Kinetic energy
What does the slope of a distance-time graph represent?
Speed
or
Velocity
What is momentum or how is it calculated?
Mass xx velocity
mxxv
What unit is mass measured with?
Kilograms kg
An object moving at constant velocity has what acceleration?
zero
What force pulls objects toward Earth?
Gravity
What type of energy does a stretched spring have?
Potential (elastic)
What does the slope of a velocity-time graph represent?
Acceleration
What are the units of momentum?
kg·m/s
What color is a black hole?
Black...duh
A car speeds up from 10 m/s to 20 m/s. Did acceleration occur?
yes
What is Newton’s First Law also called?
"Law of Inertia"
or
"An object in motion stays in motion..."
What happens to potential energy as height increases?
It increases
A flat line on a velocity-time graph means what?
Constant velocity (in a straight line, not speeding up or slowing down)
Which has more momentum:
-1 kg object at 10 m/s
or
-2 kg object at 5 m/s?
Neither! They are equal.
What is acceleration due to gravity on Earth (approx)?
9.8 m/s²
or
10 m/s2
If you travel 100 m in 10 s, what is your speed?
10 m/s
If the forces acting on an object are balanced, what are the two possibilities of the object's motion?
Constant velocity (in a straight line)
or
At rest
When you drop an object, PE turns into what?
Kinetic energy
If slope is zero on a distance-time graph, what is happening?
Object is not moving
If an object’s mass doubles and velocity stays the same, what happens to momentum?
It doubles
According to Newton's 3rd Law of motion, what will happen if you apply a force to Mr. Salo's face with your first?
His face will apply an equal and opposite force to your first...and then he will cry :(
Can an object have zero velocity but nonzero acceleration? Give an example.
Yes (the peak of a toss upward)
What happens to acceleration if force increases but mass stays the same?
Acceleration increases
Which has more KE: a fast small object or a slow heavy one?
Depends (must compare mass and speed)
A straight diagonal line on a velocity-time graph means what?
Constant acceleration
A truck and a car have the same momentum. Which has the greater velocity?
The car (because it has less mass)
If you pushed Mr. Salo off the roof of RHS, at what point would he have the most Kinetic Energy (KE)?
Right before he hits the ground.
Why would you do that?!