Question

7. The world record for pole vaulting is 6.15 m. If the pole vaulter’s gravitational potential energy at his maximum height was 4942 J, what was his mass?

Answer 1

Answer:

his mass= 81.9 kg

Step-by-step explanation:

gravitational potential energy = mgh

we are given that h=6.15m and U=4942J and assuming g=9.8m/s^2

thus using the formula for gravitational potential energy we can find out the mass.

Answer 2

Answer:

m-82 kg

Step-by-step explanation:

The gravitational potential energy is given by u =mgh , where m is the object h, is the height of the object above the ground(earth surface) and g is the gravitational acceleration constant 9.8 m by 2 .8 For

h

=

6.15

m

and

U

=

4942

J

, we can rearrange to solve for

m

:

m

=

U

g

h

m

=

4942

J

9.8

m

s

2

⋅

6.15

m

m

≈

82

k

g