Saturday

March 28, 2015

March 28, 2015

Posted by **Leah** on Saturday, November 3, 2012 at 9:06pm.

a. How much work must be done on the sail?

b. If the pulley is 50% efficient, how much work must John do on the rope to lift the sail?

- Math -
**scott**, Sunday, November 4, 2012 at 4:55pma. w = f * d = 150 * 4 = 600 Nm

b. 600 / .5 = 1200 Nm

**Answer this Question**

**Related Questions**

physical science - John is using a pulley to lift the sail on his sailboat. The ...

Algebra 2 - Are a of a sail. The area in square meters for a triangular sail is ...

calculus - Area of a sail. The area in square meters for a triangular sail is ...

Math - Suppose you have a sailboat with one triangular sail. The base of the ...

Physics - Some spacecraft design uses a solar sail made of aluminized plastic. ...

Physics - During 2004, japanese scientists successfully tested two solar sails. ...

Physics - Some spacecraft design uses a solar sail made of aluminized plastic. ...

physics - A ship sets out to sail to a point 174 km due north. An unexpected ...

math 209 - Area of a sail. The area in square meters for a triangle is given by ...

math - the triangular sail on a sailboat has a base of 4 feet and height of 6 ...