Physics

posted by .

The road runner drops a boulder from a 53 meter high building. When the block is 14 meters above the ground, the 2 meter tall Wiley Coyote looks up and sees the boulder. How much time does he have to get out of the way?

  • Physics -

    V^2 = Vo^2 + 2g*h
    V^2 = 0 + 19.6*(53-14) = 764.4
    V = 27.65 m/s at 14 m above gnd.

    h = Vo*t + 0.5g*t^2 = 14-2 = 12
    27.65t + 0.5g*t^2 = 12
    4.9t^2 + 27.65t - 12 = 0
    Use Quadratic Formula and get:
    t = 0.405 s. To get out of the way.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A 100-N boulder is sitting on a shelf 0.5 meters above the floor. If the boulder is moved 1.0 meters horizantally across the shelf how much work has been done on the boulder?
  2. Physics

    A 100-n boulder is sitting on a shelf 0.5 meters above the floor. If the boulder is moved vertically to another shelf 3.0 meters above the floor, how much work has been done on the boulder?
  3. physics

    A boulder with a mass of 2,500 kg on a ledge 200 m above the ground falls. If the boulder's mechanical energy is conserved, what is the speed of the boulder just before it hits the ground?
  4. physics

    A cement block accidentally falls from rest from the ledge of a 52.0 -m-high building. When the block is 11.5 m above the ground, a man, 1.80 m tall, looks up and notices that the block is directly above him. How much time, at most, …
  5. physics

    A cement block accidentally falls from rest from the ledge of a 51.7-m-high building. When the block is 14.9 m above the ground, a man, 2.05 m tall, looks up and notices that the block is directly above him. How much time, at most, …
  6. calculus help please!

    The infamous Wile E. Coyote has been chasing the Roadrunner again. His latest idea for a trap involved launching an enormous boulder (about 16ft in diameter) up to a height of 750 ft, hoping that it would come down crashing on the …
  7. college physics

    If a coyote is standing at the top of a 125 m cliff getting ready to drop a 230 kg boulder on a road runner. What is the potential energy of the boulder just as he is ready to drop it?
  8. physics

    A cement block accidentally falls from rest from the ledge of a 51.5 -m-high building. When the block is 12.9 m above the ground, a man, 1.60 m tall, looks up and notices that the block is directly above him. How much time, at most, …
  9. physics

    A cement block accidentally falls from rest from the ledge of a 51.5 -m-high building. When the block is 12.9 m above the ground, a man, 1.60 m tall, looks up and notices that the block is directly above him. How much time, at most, …
  10. physics

    A cement block accidentally falls from rest from the ledge of a 51.6 -m-high building. When the block is 15.7 m above the ground, a man, 1.90 m tall, looks up and notices that the block is directly above him. How much time, at most, …

More Similar Questions