physics

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 94.0 kg. The mass of the rock is 0.350 kg. Initially the wagon is rolling forward at a speed of 0.520 m/s. Then the person throws the rock with a speed of 17.5 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown directly forward.

  1. 👍 0
  2. 👎 0
  3. 👁 469
asked by Sam
  1. Total momentum is constant.
    Write that as an equation and solve for trhe new wagon speed, V'.

    94*0.52 = 93.65 V' + 0.345*17.5

    If the rock had been trown backwards, there would be a minus sign before the last term.

    1. 👍 0
    2. 👎 0
    posted by drwls

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 95 kg. The mass of the rock is 0.34 kg. Initially the wagon is

    asked by Meagan on November 4, 2011
  2. physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 90 kg. The mass of the rock is 0.26 kg. Initially the wagon is

    asked by alika on October 2, 2014
  3. Physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 94 kg. The mass of the rock is 0.27 kg. Initially the wagon is

    asked by Dreama on October 8, 2013
  4. physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon

    asked by Sarah on October 15, 2010
  5. College Physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon

    asked by Jordan on October 14, 2010
  6. Physics 141

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 93.0 kg. The mass of the rock is 0.320 kg. Initially the wagon

    asked by dakota22 on March 11, 2014
  7. Physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 97.0 kg. The mass of the rock is 0.320 kg. Initially the wagon

    asked by Sara on October 14, 2012
  8. Physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 92.5 kg. The mass of the rock is 0.310 kg. Initially the wagon

    asked by Elizabeth on October 22, 2012
  9. physics

    Buffy is rolling along in her 11.1 kg wagon at 4.6 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.5 m/s relative to the ground. This causes her wagon to go speeding forward at 13.03

    asked by jim on February 9, 2014
  10. physics

    Buffy is rolling along in her 12.7 kg wagon at 3.6 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.2 m/s relative to the ground. This causes her wagon to go speeding forward at 9.51

    asked by dean on February 9, 2014

More Similar Questions