B3.3 Mechanical systems application and selection (HL only) Questionbank

Output speed increases

Output torque decreases

Input force reduces

Output speed decreases

The energy loss due to heat

The amount of movement in the output

The force multiplication achieved

The friction within the system

First class

Second class

Third class

Fourth class

Increase torque

Maintain constant speed

Convert rotary motion to reciprocating motion

Enhance rotational friction

Higher effort required

Increased velocity ratio

Lower mechanical advantage

Reduced system mass

Reduces input speed

Changes rotary motion to linear

Magnifies force output

Balances torque

Change direction of motion

Maintain a constant rotary speed

Convert rotary motion to reciprocating

Control timing in mechanical systems

Pulley

Cam and follower

Gear train

Belt drive

Load ÷ effort

Input energy × 100

(Useful output energy ÷ input energy) × 100

Output torque × time