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 are on the rise again with a litre of petrol now costing more than Â£1.08 in many parts of the country. The average cost of a litre of petrol is now 108.28p, which is almost 2p a litre more than the 106.39p recorded just a couple of weeks ago.Diesel prices have also risen over the last few weeks, with the average price standing at 115.06p a litre compared with the 113.42p recorded on February 1.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.