What is a change in an object's speed or direction; acceleration
100
What is inertia
What is the tendency of objects to keep doing what they are doing (moving or staying at rest)
100
What is Newton's third law of motion
What is for every action, there is an equal and opposite reaction
100
Goes faster:
Goes slower:
Changes direction:
Scooter going down hill
Riding a scooter uphill
Scooter turning a corner
100
In which situation are the forces acting on the object balanced?
A hot-air balloon rises at a constant speed
200
What is contact force
What is a force that must touch an object to change its speed and/or direction
200
What is net force
What is the amount by which the opposing forces acting on an object are unequal
200
What is non contact force
What is a force that acts on an object to change its speed or direction from a distance
200
Dave is driving down the street. If Dave steps on the brakes, what force slows his car?
Contact force touches objects to change speed/direction ex: friction
200
The net force acting on an object is 0 N. Which of the following best describes the motion of the object?
The object's motion is not changing
300
What is force
What is a push or pull that causes something to change its motion
300
What is Newton
What is the metric unit used to measure force or weight
300
What is normal force
What is the force that pushes up to support the weight of an object
300
Use the formula for slope to find the speed of the object in the graph.
Slope: d m/s this means that the slope is constant
positive: increase
negative: decrease
300
Sean pushes a parked car with a force of 80 newton. The car does not move. Which of the following best describes the force that the car exerts on Sean?
The same amount of force as Sean exerts
400
What is friction
What is a force that occurs when two things move past each other and rub together
400
What is Newton's first law of motion
What is if the forces acting on an object are balanced, the object will continue doing what it is doing
400
Suppose you are playing baseball and hit a home run. What forces slow down the ball while it is in motion?
Objects in motion stay in motion until its acted by another force. Friction and gravity slow baseball's down while in motion.
400
What is the slope of the line between 4 s and 6 s? What does this say about the object's speed?
Speeding between 0-20 and 40-50 slowing down between 60-80 constant: 20-40 & 50-50
400
Which force has the greatest influence on the structure of solar system and galaxies?
Gravity
500
What is gravity
What is a force that acts without physical contact to pull two objects toward each other
500
What is Newton's second law of motion
What is the acceleration of an object is related to the net force acting on it and the mass of the object
500
If you hit the home run in space, what would happen?
The ball will move straight line at constant speed until it's going under the influence gravity such asteroid.
500
Which of the following is an example of a contact force?
Friction
500
What is the average speed of the ball from 3 s to 4 s?