VOCABULARY
Any object that makes work easier.
Machine
The harder your swing a tennis racquet, the faster the ball accelerates after you hit it highlights what law of motion.
Second Law of Motion
True or False: Scientifically, mass and weight are the same thing.
How much force is required to accelerate a 4kg mass at 4 m/s2?
16 Newtons
The force that resists the movement of objects against each other.
Friction
What is acceleration.
Change in velocity
A ball moving only once force has been applied is an example of which law of motion?
In a third class lever, where is the effort located?
Between the resistance and the fulcrum
Amy uses 20 N of force to push a lawn mower 10 meters. How much work did she do?
200 Joules
The spot where a bar turns is the known as the ____.
Fulcrum
Refers to the distance an object moves over a given amount of time in a certain direction.
Velocity
A person paddling in a kayak pushes the paddle backward against the water, and the water reacts by pushing the boat forward - highlights what law of motion?
Third Law
The ridges in the screw are called ___.
Threads
What is the acceleration of a 10kg mass pushed by 20 N of force?
2 m/s2
A speedometer measures what kind of speed?
Instantaneous Speed
In order to know if something has changed positions, you need a fixed, unmoving object or location to use called the ___.
Reference Point
The acceleration of an objects depends on what two things?
Mass and force applied
A flagpole is an example of a ____ pulley.
Fixed Pulley
How long does it take Jill to drive 300 Miles at a speed of 50 mph?
6 hours
The decrease in effort needed to move an object.
Mechanical Advantage
The amount of matter in an object.
Mass
Before Newton came up with the laws of motion, ___ discovered that contrary to what scientists of his day believed, a moving object won't come to a stop unless an outside force acts upon it.
Galileo
A gear is what type of simple machine.
Wheel & Axle
Given a force of 100 N and an accleration of 25 m/s2 - What is the mass of the object?
4 Kg
If a ramp gets steeper, what happens to the force needed to move an object?
It increases