Answered

Westonci.ca makes finding answers easy, with a community of experts ready to provide you with the information you seek. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.

2 A boy of mass 50 kg runs up a hill of vertical height
300 m in 20 minutes Calculate: a) the average vertical force he uses to lift
himself up the hillside b) the work he does climbing the hill c) his average power

Sagot :

temdan2001

The Vertical force is the same as his weight. By using the formula of work done and power, the correct answers are:

a.) 490N

b.) 147 KJ

c.) 122.5 W

Given that a boy of mass 50 kg runs up a hill of vertical height

300 m in 20 minutes.

a) The average vertical force he uses to lift himself up the hillside will be his normal reaction force (N) on the hill

N = mg

N = 50 x 9.8

N = 490N

b) the work he does climbing the hill will be

W = F x S

W = 490 x 300

W = 147000 Joules

W = 147 KJ

c) his average power will be

P = W/t

First convert the time from minutes to seconds

20 minutes = 20 x 60 = 1200 seconds

Substitute the time t and the work done W into the power formula

P = 147000/1200

P = 122.5 Watts

Learn more here: https://brainly.com/question/21854305

We appreciate your time on our site. Don't hesitate to return whenever you have more questions or need further clarification. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Thank you for visiting Westonci.ca, your go-to source for reliable answers. Come back soon for more expert insights.