Vocabulary
What is velocity?
Speed in a given direction
How do you find the average time of three trials?
Add the trials together and divide by 3 (the number of trials)
In lab 2.1, rolling the ball two different lengths is an example what type of variable?
Independent
Who came up with the 3 laws of motion?
What is Mass?
the amount of matter in an object
What is a force?
Push or Pull
How do you find the average speed?
Take the distance and divide by the average time
What force slowed the ball down after 2 meters?
Friction
What Newton's 1st Law?
an object at rest will stay at rest, an object that is moving will stay moving unless disturbed by an un balanced force.
Which ball, the steel or acrylic, have more mass?
steel
What is the dependent variable?
What you are trying to find out or the data collected
If I have an object with a lot of mass, do I need to apply more or less force to get it to move?
More
What force pushed the ball down the ramp?
Gravity
What is Newton's 2nd Law?
The acceleration of an object depends on the mass of the object and the amount of force applied.
How does the mass of an object affect the speed?
It takes less force to move it and it will travel faster
What is the resistance that one surface or object encounters when moving over another called?
Friction
Which object has more momentum, an object with a light or heavy mass?
heavy
Why should the steel ball have had a slower average speed when it was rolled on the carpet compared to the tile?
The carpet had more friction (resistance)
What is Newton's 3rd Law?
Every action has an equal and opposite reaction
How does gravity affect the acceleration of an object?
Gravity causes object to continue to increase velocity
What is acceleration?
The change of speed or direction.
When we did the lab where we tested the speed of the ball on different surfaces, what were examples of the controlled variables?
ramp, ball, length measured, people
What happens to an object when there is an equal balanced force acting on it?
Nothing, it doesn't move
If John is pushing the box with 15 N to the right and Sue is pulling the box right with 12 N, what is the net force of the box?
Right - 27 N
How does gravity affect a ball rolling up a ramp?
Gravity applies an opposite force against something going uphill.