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.
petrol prices have dipped to their lowest for three years in a boost for drivers by nathan rao the price of fuel is hoped to fall even further to be affordable for poorer motorists steve reigate it is 129 82p a litre or Â£ 5 84 a gallon and diesel is 137 27p or Â£ 6 18petrol was last below 130p in february 2011 when it was 129 86pdiesel has not been below 137 27p a litre since july 2012he rac said wholesale prices of petrol remained at about 101p a litre with diesel not rising above 105p it said it was hopeful the price fall would continue it found the cost of driving was the main concern for 1500 motorists questioned in a survey