Memory Work
What is force?
Force is a push or pull on an object, measured in Newtons.
What is Newton’s second law of motion?
Newton’s second law of motion states that force equals mass times acceleration. F=ma
What is a lever?
A lever is a solid bar that rotates around a fixed point.
What are two forms of energy?
Two forms of energy are kinetic and potential. Kinetic energy is energy in motion. Potential energy is energy that is stored.
Force is directly related to...
Mass.
What are work and power?
Work is a change in position due to an applied force. Power is work done over time.
What is Newton’s third law of motion?
Newton’s third law of motion states that for every action, there is an equal and opposite reaction.
What are some simple machines?
Some simple machines are lever, inclined plane, wheel and axle, wedge, screw, pulley.
Who is credited with the discovery of gravity?
Sir Isaac Newton.
What is speed?
Speed is the rate at which something changes position.
What is another name for Newton's first law of motion?
The law of inertia.
What other simple machine is a wedge made from?
An inclined plane.
What is gravity?
Gravity is the force that attracts one mass towards another mass.
What do you call it when an object speed is slowing down?
Deceleration.
What is a pendulum?
A pendulum is a string or bar with a weight at the end that is free to swing back and forth.
What is inertia?
Inertia is an object's tendency to stay in the condition it is in.
Name two parts or terms related to levers.
Fulcrum, effort arm, resistance, or effort.
What is friction?
Friction is the resistance two surfaces experience when they are moving against one another.
What is kinematics?
Kinematics is the study of how things move.
What is centripetal force?
Centripetal force is the force that acts on an object moving in a circle.
A car is rolling down a hill and on the way down it runs into a tractor. This collision causes the car to stop and even move backwards slightly. What law or laws of motion are being demonstrated here?
Newton's 1st and 3rd laws of motion.
What do you call two gears with parallel shafts that are connected together?
Spur gears.
What are velocity and acceleration?
Velocity is a vector which measures both speed and direction. Acceleration is the rate at which an object’s velocity is changing.
What do you call the amount of tension that a material can withstand?
Tensile strength.