Physics

A stone used in the sport of curling has a mass of 20.0 kg and is initially at rest, sitting on a flat ice surface. It is pushed with a constant force of magnitude 25.0N over a distance of 4.00 m. (Assume friction between the stone and the ice is negligible.)

(a) (i) What is the acceleration of the stone and what is the work done in accelerating it?

(ii) By considering the conservation of energy of the stone, calculate the final speed of the stone. Show that you have checked that the value for the magnitude of speed and its unit are sensible.

(b) How much power is supplied by the person pushing the stone at the beginning of the push and how much is supplied at the end of the push?

(c) Calculate the duration of the push from the acceleration and final speed. Compare this with the time calculated from the average power supplied during the push and the amount of work done.

  1. 👍 0
  2. 👎 0
  3. 👁 379

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.93 m/s. The stone subsequently falls to the ground, which is 17.1 m below the point where the stone leaves your hand. At

    asked by unknwon on October 10, 2014
  2. physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.65 m/s. The stone subsequently falls to the ground, which is 11.1 m below the point where the stone leaves your hand. At

    asked by Jordan on September 7, 2015
  3. physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.53 m/s. The stone subsequently falls to the ground, which is 14.7 m below the point where the stone leaves your hand. At

    asked by mt on May 2, 2013
  4. Physics

    A curling stone with a mass of 18 kg slides 38m across a sheet of ice in 8.0 s before it stops because of friction. What is the co¨efficient of kinetic friction between the ice and the stone? (Note: you will need to calculate the

    asked by Sarah on October 29, 2015
  5. Physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.87 m/s. The stone subsequently falls to the ground, which is 13.5 m below the point where the stone leaves your hand. At

    asked by Anonymous on September 21, 2016
  1. PSU

    A 2.3kg stone is thrown from ground directly upward. the maximum height reached by the stone is 45m. Neglecting air resistance, a) with which initial speed was the stone thrown? b)what is the flight time of the stone until it hits

    asked by Abdelaziz on October 26, 2016
  2. Physics

    A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71¡ã W] and the second stone moves away at a velocity of 1.25 m/s

    asked by tom on March 30, 2016
  3. Physics

    In the winter sport of curling, players give a 20 kg stone a push across a sheet of ice. A curler accelerates a stone to a speed of 3.0 m/s over a time of 2 s. a)How much force does the curler exert on the stone? b)What average

    asked by Lindsey on November 22, 2011
  4. Physics

    1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and the second stone moves away at a velocity of 1.25 m/s

    asked by Ryback on January 18, 2016
  5. science

    A stone of mass 20g is projected vertically upward with a catapult whose rubber has a force constant of 72Nm-1. If the tension in the cord at the point of release is 36N, find (a) the velocity of projection of the stone (b) the

    asked by Bukky on April 29, 2016
  6. LIFE ORIENTATION

    FOUR WAYS IN WHICH SPORT CAN SUPPORT NATION BUILDING.2 TWO ISSUES IN SPORT THAT IMPEDE NATION BUIDING.3.WHAT CAN TRIGGER SPECTATOR AGGRESSION IN SPORT.

    asked by MOHLALA on February 6, 2016

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