I'm not sure about these questions i'v been given. Do you know any basic formula's to use for these questions?
A strong meter rule is used as a lever and the fulcrum is placed under the mark around 90 cm. I need to find what mass would need to be placed on the long end of the lever to lift a 1kg mass on the short end?
An incline plane is used to lift a 100 kg barrel onto a drinks bar at a height of 1m. The plane is 5m long. How much force is required to roll the barrel up the plane?