# physics

posted by .

a boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10cm high in 10 seconds. What is his power? show your workings

• physics -

The height is
h = 20•0.1 = 2 m
The work is W = mgh =350•2 = 700 J
Power = Work/time = 700/10 =70 W

• physics -

A 40kilowatt electric cable ??\$ used to transmit electricity through a resistor of resistance 2ohms at 800 volts, the power loss at energy is? Pls show workings

• physics -

A generator ??\$ on daily use in the process 106kw ????? 540w tungsten box are on force the same time interval. Thee energy consumed is

• physics -

a person with a mass of 40 kg runs up a flight of stairs in 12 seconds the flight has 20 steps and the height of each step is 20cm

• physics -

133.33 W

• physics -

13.33 W

## Similar Questions

1. ### physics

A 680 newton student runs up a flight of stairs 3.5 m high in 11.4 seconds. The student takese 8.5 seconds to run up the same flight of stairs during a second trial. 1)Find the work done by the 680 N student in climbing the stairs …
2. ### physics

a boy who can generate 500 w runs up a flight of stairs in 5.0 s.how high are the stairs if the boy has a mass of 62 kg.
3. ### Physics

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2.
4. ### Physics

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2).
5. ### physics

jeritex mass is 60kg. if he climbs up the flight of stairs 13 meters high in 20 seconds, what is his power output?
6. ### energy

A boy weighing 350Newton runs up a flight of stairs consisting of 20 stairs each, 16 centimeter high in seconds, what ?
7. ### ST MICHAEL NURSERY SECONDRY AND PRIMARY SCHOOL KONTAGORA

BASIC SCIENCE. A BOY OF MASS 50KG RUNS UP A FLIGHT OF 10 STAIRS EACH OF HEIGHT 0.2M IN 5 SECONDS CALCULATE HIS POWER.
8. ### PHYSICS:

A boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10 cm high in 10 seconds.what is his power?
9. ### Physics

a boy whose weight is 600 N runs up a flight of stairs 10 m high in 12 second .What is his average power?
10. ### Phyics

A boy whose mass is 40kg runs up a flight of 30 steps,each 150mm high,in 6secs.find the average power developed.(take g=10m/s^2.

More Similar Questions