<span>Archaeologists carry out excavations in order to collect data that they eventually analyze to learn more about the past.</span>
Answer:
The elastic potential energy PE=143.47kJ
Explanation:
This problem bothers on the potential energy stored in a material.
Given data
Mass of the bungee jumper
m= 75kg
Height of jump down the cliff h=195m
We know that the elastic potential energy stored is same as the potential energy of the bungee jumper
PE= 1/2kx²= mgh
Assuming g is 9.81m/s²
PE= 75*9.81*195
PE= 143471.25J
PE=143.47kJ
What is potential energy?
Potential energy is the energy possessed by a body by virtue of it position.
Normal force = 200(9.81) = 1962 N
Friction force = 1962 * .4 = 784.8
power = force * distance / time = 784.8 * 5 = 3924 Watts
Watts = Joules / sec
3924 x 180 = 706,320 Joules
Distance of fall = (1/2) · (acceleration of gravity) · (time)²
= (1/2) · (1.63 m/s²) · (9 sec)²
= (0.815 m/s²) · (81 sec²)
= 66 meters .
On Earth ... IF there were no air ... the feather would fall
397 meters in the same amount of time !
4. 1 and 2 only.
1. the downward force is the force of gravity.
<span>2. The upward force exerted is the Normal reaction from the floor.</span>
