Physics

Two automobiles, each of mass 1000kg , are moving at the same speed, 17m/s , when they collide and stick together.

At what speed does the wreckage move if one car was driving north and one east?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. before
    x momentum = 17,000 (east)
    y momentum = 17,000 (north)
    after
    m Vx = 2000 V cos T = 17,000 still
    m Vy = 2000 V sin T = 17,000 still

    so
    sin T = cos T so T = 45 deg and sin = cos =sqrt2 /2

    2000 V (sqrt 2/2) = 17,000
    V = 17 /sqrt 2 = 12 m/s

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physical science

    Which object has the greatest kinetic energy? A: a truck with a mass of 3,500 kg moving at 30 m/s B: a person with a mass of 73 kg running 6 m/s C: a locomotive engine with a mass of 205,000 kg moving 5 m/s D: a fast pitched

  2. Physics

    Two objects with masses represented by m1 and m2 are moving such that their combined total momentum has a magnitude of 16.3 kg · m/s and points in a direction 71.5° above the positive x-axis. Object m1 is moving in the x

  3. Physics

    Car A has a mass of 1000kg and a speed of 60km/h, and car b has a mass of 2000kg and a speed of 30km/h. what is the ratio of kinetic energy of car A to that of car b?

  4. physics

    A cart of mass 340 g moving on a frictionless linear air track at an initial speed of 1.2 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision the first cart continues in its

  1. physics

    Calculate the magnitude of the linear momentum for the following cases. (a) a proton with mass 1.67 10-27 kg, moving with a speed of 4.00 106 m/s (b) a 16.5 g bullet moving with a speed of 270 m/s (c) a 70.5 kg sprinter running

  2. physics

    One object is at rest and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other words, they stick together and move off with shared velocity. The speed of the object that is moving

  3. Physics

    A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What

  4. Physics

    A snooker ball with a mass of 0.3kg moving at 2.5m/s collides with another ball of 0.2kg mass and moving in the same direction with a speed of 1.20m/s . Assuming the collision is elastic, calculate the speed and direction of each

  1. science

    A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two

  2. Physics -Conservation of Momentum-

    1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically

  3. physics

    Cart A has a mass of 3 kg and is moving to the right at 1 m/s. Cart B has a mass of 2 kg and is at rest. The carts have a perfectly elastic collision. Cart B starts moving to the right at 1.2 m/s. What is the final velocity of

  4. Physics please check

    1) Two identical automobiles have the same speed, one traveling east and one traveling west. Do these cars have the same momentum? Explain. No. Same car, same mass, same speed, but different velocity. correct. Momentum is a

View more similar questions or ask a new question.