Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.
In this lesson, we will learn how to write an equation to describe joint variation and how to use proportions to find other sets of values to solve real-world problems.
Q1:
The horsepower (hp) that a shaft can safely transmit varies jointly with its speed in revolutions per minute (rpm) and the cube of the diameter. A shaft with a diameter of 3 inches can transmit 45 hp at 100 rpm. What is the diameter of a shaft that can transmit 60 hp at 150 rpm?
Q2:
The kinetic energy πΎ of a moving object varies jointly with its mass π and the square of its velocity π£ . If an object weighing 40 kilograms with a velocity of 15 meters per second has a kinetic energy of 1 0 0 0 joules, find the kinetic energy if the velocity is increased to 20 meters per second.
Donβt have an account? Sign Up
