mechanical systems

Question 1

Lever

Answer 1

A simple machine that changes the amount of force you need to put on an object to move it.

Question 2

Incline Plane

Answer 2

A ramp or a slope that reduces the amount of force you put on an object to lift it.

Question 3

Wheel and Axle

Answer 3

Two turning objects are attached together which makes one cause the other to turn.

Question 4

Gear

Answer 4

A wheel like object with teeth around its rim.

Question 5

Pulley

Answer 5

A grooved wheel with a rope or a chain running along its groove. Changes the directions of force or the motion.

Question 6

Screw

Answer 6

Converts rotational motion to linear motion.

Question 7

Class 1 lever

Answer 7

The fulcrum is between the effort and the load.

Example: Scissors.

Question 8

Class 2 lever

Answer 8

Always exerts a greater force on a load then the effort force you exert on a lever. The load is between the effort and the fulcrum.
Example: WheelBarrow

Question 9

Class 3 lever

Answer 9

The effort is exerted between the fulcrum and the load. You exert a greater force on the lever then the lever exits on the load.
Example: Hockey stick

Question 10

difference between mass and weight

Answer 10

mass is the amount of matter in a material. weight is a measure of how the force of gravity acts upon that mass.

Question 11

Work

Answer 11

When you exert a force on an object some distance in the direction of the force.

Question 12

Effort Force

Answer 12

The force you exert to make the lever move.

Question 13

Load

Answer 13

The mass of the object that is moved or lifted by a machine.

Question 14

Effort Arm

Answer 14

The distance between the effort force and the fulcrum.

Question 15

Load arm

Answer 15

The distance between the load force and the fulcrum.

Question 16

Mechanical Advantage

Answer 16

the comparison of the force produced by a machine to the force applied on a machine.

Question 17

Speed

Answer 17

The rate of motion or the rate an object changes position.

Question 18

Kinetic energy

Answer 18

Energy in motion.

Question 19

Potential energy

Answer 19

Stored energy.

Question 20

Efficiency

Answer 20

Tells you how much energy you gave to the machine was transferred to the load by the machine.

Question 21

Internal combustion

Answer 21

Intake Stroke - piston moves down the cylinder and draws in the fuel-air mixture (fine droplets of gasoline mixed with air).
Compression Stroke - piston moves up. The fuel-air mixture is compressed into a smaller space.
Power Stroke - when the piston is almost at the top, a spark from the spark plug ignites the mixture. Hot gases expand,forcing the piston down. Energy is transferred from the piston to the wheels of the automobile
Exhaust Stroke - piston moves up again, compressing and pushing out the waste products left from burning fuel-air mixture