Question

VR for two movable pulleys

Answer 1

Answer:

pulley, then velocity ratio is

icse-solutions-class-10-physics-15

V.R = 2n

Velocity ratio of the system = 2.

Mechanical Advantage = Load/Effort = 1000/600

= 5/3

Efficiency = M.A./V.R.

= (5/3)/2 = 5/3 x 2 = 5/6

= 83.3%.

Answer 2

Answer:

Explanation:

Example

Velocity ratio = diameter of the driven pulley ÷ diameter of the driver pulley.

The smaller driver pulley turns ten times for every one turn of the driven pulley.

Output speed = input speed ÷ velocity ratio.

The smaller driven pulley will turn at 3,000 rpm.