science

posted by .

a 0.15 kg ball is thrown into the air & rises to a height of 20.0 m. how much kinetic energy did the ball initially have? ? ?

  • science -

    Vo^2 = Vf^2 - 2g*d.
    Vo^2 = 0 -(-19.6)*20 = 392.
    Vo = 19.8 m/s.
    KE = 0.5m*V^2 = 0.075 * (19.8)^2 = 29.4
    Joules.

  • science -

    thankss . what does the ^ mean tho ?

  • science -

    to the power of...

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science

    hey how u all doin? If a ball is thrown vertically upwards into the air. What is the main energy conversion that takes place as the ball rises towards its maximum height?
  2. Physics

    a 1kg ball is thrown into the air with an initial velocity of 30 m/sec. how much kinetic energy does the ball have?
  3. physics

    A ball (m=53g) is projected vertically with an initial speed of 9.2m/s. If the ball rises to a maximum height of 3.6m, how much kinetic energy is dissipated by the drag force of air resistance?
  4. 8th grade physical science

    What is the kinetic energy of a 1 kilogeram ball is thrown into the air with a velocity of 30m/sec?
  5. Phizzics....

    A 0.250 kg ball is thrown straight upward with an initial velocity of 38 m/s. If air friction is ignored, calculate the: (a) height of the ball when its speed is 12 m/s (b) height to which the ball rises before falling (c) How would …
  6. physics

    A tennis ball (m  57 g) is projected vertically with an initial speed of 8.8 m/s. (a) If the ball rises to a maximum height of 3.7 m, how much kinetic energy was dissipated by the drag force of air resistance?
  7. physics

    A spring loaded gun is used to shoot a 1.3 kg ball from a rooftop. When the gun is fired, a compressed spring will be released shooting the ball into the air. The ball will travel in a parabolic path eventually striking the ground …
  8. Algebra

    A ball is thrown into the air. The height in feet of the ball can be modeled by the equation h = -16t2 + 20t + 6 where t is the time in seconds, the ball is in the air. When will the ball hit the ground?
  9. Physics- check answer please

    1. A 15 kg boy falls out of his bed at a height of 0.50 m. What is the amount of gravitational potential energy lost by the boy?
  10. basic chemistry(projectile)

    A ball of mass 400g is thrown with an initial velocity of 30.0 ms-1 at an angle of 45.0 degrees to the horizontal.air resistance is negligible.the ball reaches a maximum height H after a time of 2.16s (1)calculate the initail kinetic …

More Similar Questions