What is a type of simple machine in which a stiff bar rotates around a fixed point called fulcrum?
A lever
100
What is a smooth metal rod with a tiny inclined plane wrapped around it?
A screw
100
What is the rate of movement?
speed
100
When a person lifts a heavy box, they use _____________.
Force
100
What type of force is used when a brake is applied and causes a vehicle to slow or stop?
friction
200
What is a simple machine that consists of a rope that fits into a wheel that is used to change direction of a force?
a pulley
200
What is the speed and direction of an object’s motion?
Velocity
200
What is a push or pull that acts on an object?
Force
200
What is a contact force that resists the movement of one surface past another surface?
friction
200
A teeter totter is an example of what type of simple machine.
A lever
300
What is a piece of material, such as metal or wood, thick at one edge and tapered to a thin edge at the other for insertion in a narrow crevice, used for splitting, tightening, securing, or levering?A wedge
A wedge
300
What is a type of energy that is stored in an object due to its position or arrangement?
Potenial energy
300
What is the energy used when a force moves on an object?
work
300
What is the force of attraction that exists between any two objects and causes objects to have weight?
Gravity
300
A loading ramp is an example of what type of simple machine.
An inclined plane
400
What is the simple machine that consists of a flat surface with one end higher than the other?
An inclined plane
400
What type of energy is related to motion or movement?
Kinetic energy
400
What is the amount of matter in an object?
mass
400
What is the tendency of an object to reject any change in motion?
inertia
400
The force that keeps a satelite orbiting around the Earth is _____________.
Gravity
500
What is a simple machine that is made up a circular object and a shaft?
A wheel and axel
500
What is a device that changes the direction or amount of force needed to do work?
A machine
500
This is how heavy an object is or the force with which an object is attracted to the earth or some other astronomical object.
Weight
500
What type of work is a pulley used for?
To lift an object
500
A knife is an example of what type of simple machine.