A large stone is rolled onto a lorry using a ramp.*1 pointThe length of the ramp is l. The stone is lifted a height of h.The mass of the stone is m. The weight of the stone is W.Which expression is equal to the useful work done on the stone?

How much work W is done in lifting a 30-kg sandbag to a height of 9 m? (Use 9.8 m/s2 for g. Round your answer to the nearest integer.)W =

4. A crate is pulled up a ramp a distance of 20 m with a force of F = [800, 500]. The crate ends up 2 m higher above the ground than where it started. a. (APP - 4 marks) Find the force applied on the crate that moves the crate up the ramp and the force that is perpendicular to the ramp that lifts the crate up off the ramp. b. (APP - 2 marks) Find the work done moving the crate up the ramp and the work done lifting the crate 2 m above the ground.

A farmer is using a ramp to drag a sack of wheat up into a barn. Identify the load force in this situation. The weight of the sack of wheatThe weight of the farmerThe pulling force applied by the farmerThe weight of the ramp

A crate of mass 23 kg is pushed up a ramp by a person as shown in the figure below. The person pushes the crate a distance of 27 m as measured along the ramp. Assume the crate moves at constant velocity. Assume the coefficient of kinetic friction between the crate and the ramp is 𝜇K = 0.32. angle is 30 degrees What is the work done by the person as he pushes the crate up the ramp?

[iv] A construction worker holds a heavy tool box in his hands for 2hour. How much work is done by the worker in those two hour? [a] mgh [b] ½ mv2 [c] zero [d] none of the above.