Newtons Laws 1
Newtons Laws 2
Vocab
KE and PE
Math! (Double Points)
100
An object at rest stays at rest unless acted on by this.
Unbalanced force
100
This formula calculates force.
Force = mass x acceleration
100
A push or pull on an object.
Force
100
What is kinetic and potential energy?
Kinetic - energy of motion
Potential - stored energy
100
A 5 kg object accelerates at 2 m/s². What is the force?
F=ma
10 N
200
The tendency of an object to resist changes in motion.
Inertia
200
If mass stays the same and force increases, ________ increases.
acceleration
200
The rate at which velocity changes.
Acceleration
200
A pendulum is swinging and is at its highest point (far right/far left). Describe its kinetic and potential energy.
All potential, no kinetic
200
An object accelerates at 10 m/s2 with a force of 20 N. How much is its mass?
2 kg
300
Which direction is this block moving? With how much force?
Right, 17 N
300
A truck and bicycle receive the same force. Which object accelerates less?
The truck
300
If an object has balanced forces, it is doing what?
Not moving
300
These two things increase the total energy in a system.
Mass and Velocity
300
An object is moving 10 meters in 3 seconds. What is its speed?
Speed = distance / time
3.33 m/s
400
Which direction is this block moving?
5 N North
400
If you throw a pencil, how can you increase its speed?
More force
400
A force that slows moving objects by rubbing surfaces together.
Friction
400
The faster an object moves, the more ________ it has.
Kinetic Energy
400
Calculate the Kinetic Energy of an object with a mass of 10kg and a velocity of 2m/s2.
KE = ½ x mass x velocity ²
20 J
500
What is the net force and direction?
3 N Left
500
Two cars crash into each other. One is a truck and has a much larger mass and crushes the other. Why does it crush the other one despite both cars going the same speed?
It has more mass, and thus it exerts more force.
500
What is the unit for Force?
Newtons
500
A ball, before dropped, has 15 J of Potential Energy. How much kinetic energy will it have when it falls?
15 J
500
Calculate the Kinetic Energy of an object with a mass of 5kg and a velocity of 4m/s2.
KE = ½ x mass x velocity ²
40 J