A49 kg pole vaulter running at 10 m/s vaults over the bar. her speed when she is above the bar is 0.7 m/s. the acceleration of gravity is 9.8 m/s2. find her altitude as she crosses the bar. neglect air resistance, as well as any energy absorbed by the pole.

Height will be 5.127 m

Explanation:

We have given mass m = 49 kg

Speed over the bar v = 10 m /sec

Acceleration due to gravity

Kinetic energy on the ground

Potential energy on the ground (as height will be zero )

Speed above the bar = 0.7 m /sec

So kinetic energy above the bar

Potential energy above the bar = mgh

From energy conservation

Total kinetic energy = total potential energy

So

a. are

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)