1. Questions

physics

A 170 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 53 m below the rim. A student (majoring in linguistics and physics) decides to perform a rescue/experiment using a nearby horse. After lowering a rope to her fallen hero and attaching the other end to the horse, the student measures how long it takes for the horse to pull the fallen physicist to the rim of the Grand Canyon.
The acceleration of gravity is 9.8 m/s2.
If the horse’s output power is truly 1 horsepower (746 W), and no energy is lost to friction, how long should the process take?
Answer in units of s

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
lynn

  1. t= mgh/746

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
    Anonymous

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physically

    4. If you shout across a canyon and hear an echo 3.0 s later , how wide is the canyon?

  2. physics

    A motorcyclist is trying to leap across a canyon by driving horizontally of the cliff that is 70.0 m high at 38.0 m/s. Ignoring air resistance, use energy conservation to find the speed with which the cycle strikes the ground at a

  3. Physic

    If you shout across a canyon and hear the echo 0.57 s later, how wide is the canyon?

  4. Physics

    Suppose you are hiking down the Grand Canyon. At the top, the temperature early in the morning is a cool 1°C. By late afternoon, the temperature at the bottom of the canyon has warmed to a sweltering 37°C. (a) What is the

  1. Physics

    In a classroom demonstration, a 79.2-kg physics professor lies on a “bed of nails.” The bed consists of a large number of evenly spaced, relatively sharp nails mounted in a board so that the points extend vertically outward

  2. Physics

    You are on the roof of the physics building, 46 m above the ground. Your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professor’s

  3. physics

    Karen shouts across a canyon and hears an echo 3.1 s later. How wide is the canyon? The speed of sound is 343 m/s. Answer in units of m

  4. physics

    Hans stands at the rim of the Grand Canyon & yodels down to the the bottom. He hears his yodel echo back from the canyon floor 5.20 seconds later. Assume that the speed of sound in air is 340 m/s. How deep is the canyon?

  1. phsycs

    A person shouts in a canyon. 3 s later they hear the echo. How far away is the canyon wall from which the sound wave was reflected? how do i do this problem?

  2. math

    The time t (in seconds) that it takes for an object to fall a distance of s feet is given by the formula t = radical symbol s /4 In some places, the Grand Canyon is one mile (5,280 feet) deep. How long would it take a stone

  3. physics

    If you shout across a canyon and hear an echo 3.6 s later, how wide is the canyon?

  4. calculus

    im not good in math. The Grand Canyon is 1600 meters deep at its deepest point; a rock is dropped from the rim above this point. Express the height of the rock as a function of the time t in seconds. How long will it tale the rock

View more similar questions or ask a new question.