physics

A boy with a mass of 50 kg climbs 40m vertically when walking up the stairs of the campus. How much work does he do against gravity?

  1. 👍
  2. 👎
  3. 👁
  1. work = force * distance, so 50*9.81*40 = 1962J

    1. 👍
    2. 👎
    👤
    oobleck

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    At what rate is a 60.0-kg boy using energy when he sprints up a flight of stairs 10.0 m high in 8.00 s? A. 75.0 W B. 48.0 W C. 735 W D. 480 W E. 4.80 kW

  2. physics

    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

  3. Physics

    How much work is done when a mass of 3 kg (weighing 30 N) is lifted vertically through 6 m?. A hiker climbs a hill 300 m high. If she has a mass of 50 kg calculate the work she does in lifting her body to the top of the hill.

  4. physics

    A boy of mass 50kg runs up a set of stairs of total height of 3.0m.find the work done against gravity

  1. Physics ~please help me~

    1.) Two people of the same mass climb the same flight of stairs. The first person climbs the stairs in 25 s; the second person does so in 35 s. a) Which person does more work?Explain b) Which person produces more power?Explain 2.)

  2. physics

    A man whose mass is 70 kg walks up to the third floor of a building. This is a vertical height of 12 m above the street level. (a) How many joules of work has he done? (b) By how much has he increased his potential energy? (c) If

  3. physics

    A woman with a mass of 65kg climbs a set of stairs that are 3m high. How much gravitational potential energy does she gain? Thank you.

  4. 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?

  1. Science

    A pupil of mass 50kg runs a flight of 20 stairs each 25cm high in a time of 20 seconds,[Take g=10/kg ] calculate the pupil's gain in potential energy and the useful power developed by the pupil in climbing the stairs.

  2. physics

    a ball of mass 4kg is thrown vertically upwards with a velocity of 40m/s.Find a-maximum height b-height after 3 seconds c-time of flight

  3. physics

    a boy with a mass of 60kg climbs a 10m vertially up a ladder. A) how far did he travel? B) how much work is done? C) what are the energy changes here?

  4. science

    A 80 kg firefighter climbs flight of stairs 6 meter high in 10 seconds. How much work is required by the firefighter?

You can view more similar questions or ask a new question.