Answered

Welcome to Westonci.ca, where you can find answers to all your questions from a community of experienced professionals. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

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 trusting us with your questions. We're here to help you find accurate answers quickly and efficiently. Thank you for your visit. We're committed to providing you with the best information available. Return anytime for more. Westonci.ca is your go-to source for reliable answers. Return soon for more expert insights.