Physics

posted by Kim

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


-how much potential energy does the ball have when it reaches the top of its ascent?

-how high into the air did the ball travel?

  1. MathMate

    Assume potential energy on ground is zero.
    Kinetic energy at 30 m/s
    =(1/2)mv²
    Potential energy at highest point, H from ground
    =mgh
    Equate energies,
    mgh=(1/2)mv²
    h=(1/2)mv²/mg
    =v²/(2g)

  2. Amogelang

    A girl hold a 2kg netball at height of 1,5 m above the ground and throws is vertically upwards at a velocity of 4 m.s.it reaches its turning point and falls back to the ground

Respond to this Question

First Name

Your Answer

Similar Questions

  1. physics

    a boy who is 1.5m tall throws a ball into the air the ball attains a height a of 3m above the boy's head and then falls back to the ground the boy's hand was 1.2 m above the ground when he released the ball how long does it take to …
  2. physics

    Two balls are connected by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.45 kg and is held 0.74 m above the ground. Ball 2 has a mass of 5.7 kg and is held 0.88 m above the ground. When the balls …
  3. College algebra

    When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -5t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in meters/sec and “k” …
  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. physics

    A 0.73 kg ball is thrown straight up with an initial velocity of 2.50 m/s. Taking the potential energy of gravity to be zero at the height from which the ball is thrown, determine its gravitational potential energy at the balls highest …
  6. 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?
  7. 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 …
  8. physics

    a ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s.calculate the potential energy (I) half way up (ii) at its maximum height.what is the kinetic energy as it leaves the ground
  9. Physics

    A 5kg ball is dropped from a height of 10m a) find the initial potential energy of the ball B. Find the kinetic energy of the ball just before it reaches ground. C. Calculate the velocity before it reaches the ground.
  10. physics

    a 0.5 kg ball is thrown upward with an iniatial speed of 10 m/s, what is the initial kinetic energy of the ball and the total mechanical energy assuming initial potential energy is zero.

More Similar Questions