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.
The price of fuel is expected to skyrocket next week following a surge in international petroleum prices a fortnight ago. Fuel prices to rise in Zimbabwe Oil prices went up sharply over the past two weeks to hit US$41 a barrel of crude oil from a record low of US$28 per barrel recorded in January this year. The price of crude oil had been on a freefall since June 2014 after touching a record high of US$118 per barrel before receding to US$28 per barrel early this year. Currently, the pump price of petrol is between US$1,20 and US$1,24 per litre while diesel is selling at between US$0,92 and US$1,04 per litre.