Power definition

Question 1

Explain the concept of work in relation to simple machines

Answer 1

When a force acts upon an object to cause a displacement of the object, it is said that work was done upon the object.

Question 2

Define power

Answer 2

Power (P) is the rate at which work is done per unit time

Question 3

Define work

Answer 3

Work is a measure of the energy expended by a force in moving an object a certain distance in the direction of that force measured in joules (J)

Question 4

Define velocity ratio

Answer 4

the ratio of a distance through which any part of a machine moves to that which the driving part moves during the same time

Question 5

Define Mechanical advantage

Answer 5

the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine

Question 6

Define efficiency

Answer 6

Efficiency in mechanical systems is the measure of how effectively a machine converts input energy into useful output energy.

Question 7

Define gear ratio

Answer 7

the ratio of the number of turns the output shaft makes when the input shaft turns once