Work = force x distance. So a pulley that reduces  force will also increase distance -   but -   it can reduce the force needed to move something  â¦ thus making life easier.    Answer:   It depends on the number of pulleys and their arrangement. A single  pulley does not change the force required to lift something. But,  other pulley arrangements do. Four pulleys can be arranged into a  thing called a block & tackle that can divide the force  required to lift something by four. But, the rope must be extended  four times as long to do this.
Petrol price hiked by 75 paise; diesel by 50 paise. Petrol in Delhi currently costs Rs 71.51 per litre and after the increase it will be priced at Rs 72.43 per litre, including VAT. Petrol price cut by Rs 1.15 per litre; diesel hiked by 50 paise.
Fuel prices have risen again with the average cost of petrol now standing at 108.28p per litre. Diesel prices are also higher than they were three weeks ago, rising from 113.42p a litre on February 1 to 115.06p a litre.uel prices on the rise again: Average cost of a litre of petrol soars to Â£1.08, increasing by 2p in just a matter of weeks. 1  Fuel prices rise again with petrol now costing on average 108.28p per litre.