Physics

a body (A) is moving with a speed of 250m/s in the positive x-direction, collides with body (B) initially at rest and having the same mass as (A). after collision the speed of body (A) is 100m/s making 30 degree with the horizontal. the speed and direction of body (B) after the collision is:

a) 50 m/s f= 71 degree
b)25 m/s f= 30 degree
c) 171 m/s f= 17 degree
d) 342 m/s f= 34 degree

  1. 👍 0
  2. 👎 0
  3. 👁 186
  1. assume each mass is 1 kilogram
    momentum before = momentum after
    i is x direction, j is y direction
    before = 250 i and 0 j
    after
    Ai = 100 cos 30
    Aj = 100 sin 30 = 50
    Since Aj + Bj = 0,
    Bj = -100 sin 30 = -50

    250 = Ai + Bi = 100 * .866 + Bi
    250 = 86.6 + Bi
    Bi = 163

    V^2 = 50^2 +163^2
    V = 171

    tan theta = -50/163 = -17 deg

    so c

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A sports car moving at constant speed travels 120 m in 5.1 s. If it then brakes and comes to a stop in 4.0 s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2. (Take the positive direction to be

    asked by Hal on August 18, 2011
  2. physics

    A softball of mass 0.220 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward

    asked by Shane on December 9, 2009
  3. physcis

    a particle moving at a velocity of 6 m/s in the positive x direction is given an acceleration of 3.9m/s^2 in the positive Y direction for 3.4s. what is the final speed of the particle? answer in units of m/s

    asked by vanessa on December 11, 2010
  4. Science

    A steel ball A of mass 20.0 kg moving with a speed of 2.0 ms−1 collides with another ball B of mass 10.0 kg which is initially at rest. After the collision A moves off with a speed of 1.0 ms−1 at an angle of 30º with its

    asked by Kalash on March 24, 2019
  5. Physics

    A barge with mass 1.7×105 kg is proceeding down river at 6.1 m/s in heavy fog when it collides broadside with a barge heading directly across the river. The second barge has mass 2.83×105 kg and was moving at 4.2 m/s.

    asked by Rachel on November 3, 2009
  1. physics

    A body of mass 5kg moving with a speed of 3m/s collides head on with a body of mass 3kg moving in the opposite direction at speed of 2m/s The first body stops after the collision The final velocity of the second body is Ans:3m/s

    asked by Thousif on August 21, 2017
  2. Physics

    A body B moving with a velocity of 20m/s collides with another body A, moving in the same direction on same horizontal line, with a velocity of 10m/s. If the mass of a body A is three times the mass of a body B, and the collision

    asked by caleb on October 27, 2019
  3. physics

    A 14 kg body is moving through space in the positive direction of an x axis with a speed of 220 m/s when, due to an internal explosion, it breaks into three parts. One part, with a mass of 6.4 kg, moves away from the point of

    asked by john on March 29, 2011
  4. algebra

    skater n 58.9 kg is moving north at a speed of 7.8 m/s when she collides with skate E 72.6 kg moving east at 3.5 m/s the two skates together in what direction and with what speed do they move after the collision draw and label a

    asked by Desire Ngarambe on December 13, 2017
  5. physics

    A ball (mass 12 kg) moving at 15 m/s in the +x-direction collides with a ball (mass 36 kg) moving at 5.0 m/s in the +y direction. After colliding, the 12-kg ball moves at 6.0 m/s at an angle of 30°above the +x direction.

    asked by K on July 1, 2015
  6. physics101 please

    a 12,000 kg truck is moving right at 22 m/s collides with and sticks to a 1200 kg car moving to the right at 16 m/s. With what speed do the two vehicles move after the collision and in what direction?

    asked by melanie on October 19, 2015

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