Science 8-2: Mechaincal Systems Section 2.0 Questions

Describe a situation where a person exerts force yet does no work.

Calculate the work done when a person pulls a sled with a force of 300 N over a distance of 5 meters.

Using the information provided calculate the Mechanical Advantage and Speed Raio for a lever that has the characteristcs provided in the question.

When you are riding a bike up a steep hill, would you choose a gear that had the hihest gear ration or the highest mechanical advantage? Explain your answer.

Calculate the pressure on the fluid in a hydraulic jack that has a piston area of 16cm² and to which you apply a force of 400 N.

Describe the relationship between the following:

a) the pressure in a hydraulic system and the surface area of the pistons

b) the force in a hydraulic system and the surface area of the pistons

A hydraulic system consists of two pistons connected by a short flexible tube with a diameter of 0.5 cm. The connecting tube was then replaced with one that had a smaller diameter. What effect would this have on the performance of the hydraulic system?