Physics

posted by .

A block starts at rest and slides down a fric- tionless track. It leaves the track horizontally, flies through the air, and subsequently strikes the ground.What is the speed of the ball when it leaves the track? The acceleration of gravity is 9.81 m/s2 .

  • Physics -

    You must figure out how far the ball falls vertically (not the distance down the track but that times the sin of the inclination angle of the track from horizontal)
    then v^2 = 2 g h
    where h is that falling distance in meters
    g is gravity acceleration, about 9.8 m/s^2
    v is speed in meters.second.
    That comes from conservation of energy
    (1/2) m v^2 + m g h = constant
    h goes down. v goes up

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A block starts at rest and slides down a fric- tionless track. It leaves the track horizontally, flies through the air, and subsequently strikes the ground. What horizontal distance does the block travel in the air?
  2. PHYSICS WORK PROBLEM due tonight!! please help!

    A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = …
  3. last physics problem!

    A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = …
  4. Physics

    A ski jumper starts from rest 51.0 m above the ground on a frictionless track and flies off the track at an angle of 45.0° above the horizontal and at a height of 12.0 m above the ground. Neglect air resistance. (a) What is her speed …
  5. Physics

    A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.81 m from the end of the track after falling a vertical distance h2 = …
  6. Physics

    The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial …
  7. Physics

    The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial …
  8. physics

    A ski jumper starts from rest 44.0 m above the ground on a frictionless track, and flies off the track at an angle of 45.0° above the horizontal and at a height of 14.0 m from the ground. Neglect air resistance. (a) What is his speed …
  9. physics

    A block starts at rest and slides down a fric- tionless track. The acceleration of gravity is 9.81 m/s2 . It leaves the track horizontally, striking the ground (as shown in the figure above). b b b b b b b b b b b b 502 g h 2.2 m 4.4 …
  10. Physics (Algebra-based)

    A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section of the track.It leaves the track horizontally, flies through the air, and subsequently strikes the ground. gravity= 9.81 …

More Similar Questions