Mechanical Systems Vocab Examples

Question 1

E: Hydraulic Lift
NE: Pneumatic Systems

Answer 1

Demonstrates Pascal’s Law

Question 2

E: Hammering a nail (force was concentrated on a small area)
NE: Hammering a bowling pin (larger area, so less concentrated)

Answer 2

Demonstrates Pressure

Question 3

E: hitting a ball
NE: mass

Answer 3

Demonstrates Force

Question 4

E: 10m x 10m = 10m squared
NE: a line (not 2D)

Answer 4

Demonstrates Area

Question 5

E: Piston
NE: iron plate

Answer 5

Piston

Question 6

E: A pressure cooker (only energy exchanged)
NE: a pot of boiling water w/ no lid (energy and matter are exchanged)

Answer 6

Closed system

Question 7

E: air brakes on buses
NE: hydraulic systems

Answer 7

Pneumatic systems

Question 8

E: hydraulic braking in a car
NE: pneumatic systems

Answer 8

Hydraulic system

Question 9

E: forklift
NE: roped lift

Answer 9

Hydraulic lift

Question 10

E: Lifting an apple
NE: meters/newtons

Answer 10

Joules

Question 11

E: middle part in a class 2 lever
NE: effort

Answer 11

load

Question 12

E: class 1 lever
NE: wheel and axle

Answer 12

lever

Question 13

E: elbow
NE: your muscle

Answer 13

Fulcrum

Question 14

E: bicep muscle
NE: load on hand

Answer 14

effort arm

Question 15

E: force applied on scissors
NE: force exerted on scissors

Answer 15

Effort force

Question 16

E: fuel burned into an engine
NE: vehicle moving from fuel

Answer 16

Input Work

Question 17

E: vehicle moving from fuel burned
NE: fuel burned into the engine

Answer 17

Output work

Question 18

E: a ramp (more distance less force to lift smth)
NE: single fixed pulley (the input force = output force, so no MA)

Answer 18

Mechanical Advantage

Question 19

E: car travelling 70m/hr
NE: the car isn’t moving

Answer 19

Speed

Question 20

E: bicycle wheels
NE: a lever

Answer 20

Wheel and axle

Question 21

E: the power transmission gears in a bike
NE: wheel and axle

Answer 21

Gear

Question 22

E: Driver: 20 teeth Follower: 10 teeth
Ratio: 2:1
NE: pulley/ 2 unrelated quantities ex. weight and height

Answer 22

Speed Ratio

Question 23

E: a water well
NE: a lever

Answer 23

Pulley

Question 24

E: trying to push a book across the floor
NE: someone lifting a heavy object (no relative motion b/w 2 surfaces)

Answer 24

Friction

Question 25

E: a light bulb's efficiency NE: a speaker losing heat which reduces its power

Answer 25

Efficiency

Question 26

E: a ball at the top of a hill NE: a ball rolling at the bottom of the hill (kinetic)

Answer 26

Potential energy

Question 27

E: a ball rolling at the bottom of the hill NE; a ball at the top of a hill (potential)

Answer 27

Kinetic energy