Purchase Solution

# Working with power, force and efficiency in a speed problem

Not what you're looking for?

A 7.5 x 10^4 W motor that is 75% efficient exerts an average force of 3.5 x 10^3 N to move a boat at a constant speed. How fast is the boat moving?
NOTE: efficiency = output/input.
Motors are rated as to their input. 7.5 x 10^4 is the power input.

##### Solution Summary

The response explains the problem, displays the calculations and arrives at an answer.

##### Solution Preview

The output power of a motor has the relation with the force it ...

##### Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

##### The Moon

Test your knowledge of moon phases and movement.

##### Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

##### Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.