A
The change in an object’s position relative to a reference point.
Motion
The distance and direction of the object’s change in position.
Displacement
The speed and direction of of an object
Velocity
Distance/time =
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
Newton's First Law
The further you pull back a slingshot, the more you increase it's ____________ ______________ __________.
Elastic Potential Energy
Curling stones colliding and bouncing off of each other are an example of what type of collision?
Elastic
How fast are you going if you travel 400 miles in 2 hours?
200 miles per hour
The velocity multiplied by the mass of an object equals what?
The momentum
If you weigh 100 pounds on earth, how will your weight change if you traveled to the moon? Increase, decrease, or stay the same.
Decrease, because the force of gravity is less.
A car travels 20 miles South, then 70 miles North, what was his total displacement?
50 miles North
When there are two equal forces acting on an object in opposite directions.
Balanced force
How many centimeters per minute are you going if you travel 500cm in 10 minutes?
50 cm per min
If the mythbusters are driving a truck 60 miles per hour and they shoot a soccer ball out the back going -60 miles per hour, how fast will the ball be traveling?
0 mph
If you have a mass of 65kg on earth, how will your mass change if you traveled to the moon? Increase, decrease, or stay the same.
Your mass would stay the same.
A car travels 20 miles south, then 70 miles north, what was his total distance travelled?
90 miles
Increases
How long will it take you to travel 300 miles if you are driving 60mph?
5 hours
As you increase the velocity of an object, but keep the mass the same, what happens to the momentum?
Increases
Which has a larger Inertia, A 3,000 kg car going 30m/s or a 20,000 kg truck going 1.8 m/s?
A car travels 20 miles south, then 70 miles East, what was his total displacement?
72.8 miles southeast
Which has a larger momentum, A 2,650 kg car going 30m/s or a 32,645 kg truck going 1.8 m/s?
Car
Explain why cars have crumple zones
Crumple zones increase the time it takes to stop which decreases the acceleration and thus decreases the force.
Which has a larger acceleration, a motorcycle going from 0-100mph in 60 seconds, or a car going from 0-25mph in 3 seconds
Explain how a cannon shoots a cannonball out so fast, while the cannon only recoils a little bit.
The forces are the same on the cannon and cannonball, but because the mass of the cannonball is less the acceleration is much greater than the massive cannon.