Physics

A girl throws a ball at a fence 10m away. The ball is 2m from the ground when it
leaves her hand with an initial velocity of v=8 i+8 j m/s. When the ball hits the
fence its horizontal velocity component is reversed (the vertical velocity component
is unchanged). Where does the ball hit the ground?

  1. 👍 0
  2. 👎 0
  3. 👁 81
asked by Jason
  1. Calculat the distance d (metres) it hits the ground when there is no wall. Use reflection to calculate the bounce off the wall.

    Then
    case 1: if d>10 m.
    Ball hits ground at (d-10) before the wall.
    case 2: if d<10 m.
    Ball hits ground at d m. from the girl.

    1. 👍 0
    2. 👎 0
    posted by MathMate

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    girl throws the ball with a certain angle. It covers maximum horizontal distance R. How much height ball reaches if she throws the same ball vertically upward? Assume her muscles give the ball same speed in each case.

    asked by amol on August 14, 2012
  2. Physics

    A girl hits a ball at an angle of arc tan3/8 to the horizontal from a point O which is O.5m above level ground.The initial speed of the ball is 15m/s at the height of 18m from the girl,find the time taken for the ball to reach the

    asked by Enimatique Alogorithm MM on October 5, 2015
  3. Physics

    A ball of mass 0.6 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 18 m/s at angle of 58◦ above the horizontal. The

    asked by Lucy on September 9, 2015
  4. Physics

    PLEASE help! This is due tomorrow, and I really need to know how to do it. A ball of mass 0.6 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves

    asked by Anonymous on September 9, 2015
  5. Physics

    A girl throws a ball vertically upwards at 10m/s from the roof of a building 20m high. How long will it take the ball to reach the ground? What will its speed be when it strikes the ground?

    asked by Cesar on September 24, 2017
  6. Physics

    A girl riding a bicycle at 2.16 m/s throws a tennis ball horizontally forward at a speed of 1.38 m/s relative to herself. The tennis ball lands 1.84 m horizontally from the point at which the girl released the ball. How high above

    asked by Asia on November 13, 2012
  7. Physics

    Lily throws a ball at an angle of 53.13 degrees above the horizontal from a building that is 10m high. The ball has a speed of 12m/s, .6 seconds after she throws it. What was the initial speed of the ball? This is a vector problem

    asked by Hasan on November 6, 2015
  8. Physics.. please help!!!!!

    A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 16 m/s at angle of 46◦ above the horizontal. The

    asked by Elle on October 20, 2011
  9. Physics

    A batter hits a pitched ball when the center of the ball is 1.35 m above the ground.The ball leaves the bat at an angle of 45° with the ground. With that launch, the ball should have a horizontal range (returning to the launch

    asked by Devin on October 9, 2012
  10. Physics

    A ball of mass 0.6 kg, initially at rest, is kicked directly toward a fence from a point 20 m away. The velocity of the ball as it leaves the kicker's foot is 17 m/s at angle of 45 degrees above the horizontal. The top of the

    asked by Sarah on October 6, 2015

More Similar Questions