Show:
Force
Motion
True or False
Simple Machines
Newton's Laws
100
The force that opposes motion between two surfaces.
What is friction?
100
A push or a pull.
What is force?
100
The amount of matter in an object is called its weight.
What is false. Mass!
100
The part of the simple machine that receives the effort.
What is the effort arm?
100
If you push a shopping cart, it will roll across the parking lot until friction and air resistance slow and eventually stop its motion.
What is Newton's First Law of Motion, "objects in motion will stay in motion unless acted on by an outside force. Objects at rest will stay at rest unless acted on by an outside force.
200
Resistance to change.
What is inertia?
200
The speed of an object in a specific direction.
What is velocity?
200
The force applied to a machine is called work.
What is false. Effort!
200
A screwdriver or a fishing pole can act as this simple machine.
What is a lever?
200
For each action force, another object pushes back with its own reaction force.
What is Newton's Third Law, for every action there is an equal and opposite reaction?
300
The result of unbalanced forces.
What is motion?
300
The measure of gravitational force or attraction that draws one object to another.
What is weight?
300
A machine that takes one force and changes it to a different force is a simple machine.
What is true!
300
A ramp is an example of this simple machine.
What is an inclined plane?
300
These are ways you could make a race car accelerate faster.
What is increasing the power of the engine, and reducing friction and drag. You could also decrease the mass of the car.
400
The force that pulls on objects, and increases with greater mass and decreases with greater distance.
What is gravity?
400
Distance traveled per unit of time.
What is speed?
400
Energy that is stored in an object is called kinetic energy.
What is false. Potential energy!
400
Scissors and knives are examples of this simple machine.
What is a wedge?
400
As the mass of something increases, if the force applied stays the same, the acceleration will decrease.
What is Newton's Second Law, force equals mass times acceleration?
500
The idea that energy cannot be created or destroyed.
What is the Law of Conservation of Energy?
500
When two forces act on an object in opposite directions.
What is a balanced force?
500
When a force moves an object over a distance, it is called work.
What is true!
500
The ratio of input energy to output work.
What is efficiency?
500
An elevator lifts a 300 Newtown object 10 meters. How much work did the elevator do?
What is 3,000 joules or newton-meters?