A 52-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is 1.2 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.

The altitude is 5.03 m

Explanation:

Given:

Mass of pole kg

Speed of vaulter

Speed of vaulter when she is above the bar

For finding altitude we use conservation of energy,

          ( ∵ initial height is zero )

                              ( ∵ )

    m

Therefore, the altitude is 5.03 m

i'm only doing this for the points : (

explanation:

i'm only doing this the points

temp rises, and expansion