Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
11.5k views
in Physics by (53.1k points)
closed by

A boy of mass 50 kg runs up a staircase of 45 steps in 9s. If the height of each step is 15 cm, find his power. (Take g = 10 ms-2 )

1 Answer

+1 vote
by (49.2k points)
selected by
 
Best answer

Given 

Mass of Body (m) = 50 Kg, 

Time (t) = 9s, 

Height of each step = 15 cm, 

Acceleration due to gravity (g) = 10 m/s2 .

Now

Weight = mg = 50×10 = 500N

Height of staircase = 45 x \(\frac{15}{100}\) = 6.75 m    (∵ 1m = 100 cm )

Power = \(\frac{Work}{Time}\) = \(\frac{mgh}{t}\)

⇒ Power = \(\frac{500\times6.75}{9}\) = \(\frac{3375}{9}\)

Power = 375 Watt

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...