Answered

Westonci.ca is the Q&A platform that connects you with experts who provide accurate and detailed answers. Explore our Q&A platform to find in-depth answers from a wide range of experts in different fields. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

If you lift a seven pound object 54 inches how many joules of energy did you use?

Sagot :

vihapatel66
w=f*deltax
f=ma
a=9.8(gravitational acceleration)
(7)(9.8)=68.6n
w=(68.6)(54)=3704.4J

Answer:

-42.68 J  

Explanation:

Work done = weight x displacement

weight = 7 pound

           = (7 x 4.45) N

           = 31.15 N

Displacement = 54 inches

1 inch = 0.0254 m

54 in = 1.37 m

Work done = 31.15 N x 1.37 m x cos 180°

                   = -42.68 J

Thus, the amount of energy used to lift 7 pound object to 54 inches, 42.68 J of energy is used.

Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Thank you for using Westonci.ca. Come back for more in-depth answers to all your queries.