physics 3!!**

posted by .

In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 120 kg,

a.) What is the mass of the receiver?

b.) Calculate the kinetic energy of the tackle-receiver system before and after the collision.
KEsys, i = J
KEsys, f = J

  • physics 3!!** -

    Momentum is conserved.
    Momentum before = MassTackle*5
    momentum after =(masstackle+massreceiver)4

    set them equal, you know themass of the tackle, solve for massreceiver.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 105 kg, a.) What …
  2. Physics

    In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 105 kg, a.) What …
  3. physics

    A quarterback throws the football to a stationary receiver who is 22.7 m down the field.The football is thrown at an initial angle of 39◦ to the ground. The acceleration of gravity is 9.81 m/s2 . a) At what initial speed must …
  4. physics

    A quaterback throws the football to a stationary receiver who is 31.5m down the field. If the football is thrown at an initial angle of 40.0 degrees to the ground, at what initial speed must the quaterback throw the ball for it to …
  5. physics

    A quarterback throws the football to a stationary receiver who is 16 m down the field.The football is thrown at an initial angle of38.5◦to the ground.The acceleration of gravity is 9.81 m/s2.a) At what initial speed must …
  6. physics

    In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity …
  7. physics

    In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.9 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity …
  8. AP Physics

    A quarterback throws the football to a stationary receiver who is 15.2 m down the field. The football is thrown at an initial angle of 42 ◦ to the ground. The acceleration of gravity is 9.81 m/s 2 . a) At what initial speed …
  9. physics

    In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +3.62 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity …
  10. physics

    In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.4 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity …

More Similar Questions