The change in the skier's gravitational potential energy is 199430 J.
<h3> Gravitational potential energy:</h3>
This is the energy of a body due to its position in a gravitational field. The S.I unit of gravitational potential energy is Joules (J)
The Change in the skier's gravitational potential energy can be calculated using the formula below.
Formula:
- ΔP.E = mg(Δh)............... Equation 1
Where:
- ΔP.E = Change in the skier's potential energy
- m = mass of the skier
- Δh = change in height to which it was raised
- g = acceleration due to gravity.
From the question,
Given:
Substitute these values into equation 1
- ΔP.E = 55×370×9.8
- ΔP.E = 199430 J.
Hence, The change in the skier's gravitational potential energy is 199430 J.
Learn more about potential energy here: brainly.com/question/1242059
False, <span>Nanotechnology is proving effective at helping clean up PCB’s.</span>
BaCI2 stands for Barium Chloride.
Answer:
Options B, A, D, C
Explanation:
When a scientists, let's say Roberto wonders if the presence of other elements also affects the color of a flame, he can decide to prove this through a study. Therefore, in chemistry class, Roberto sees that traces of lithium makes a flame appear bright red. Subsequently, Roberto designs an experiment to test flame color in the presence of different elements and finally Roberto's friend tells him the color of a flame cannot be changed, but Roberto is still unsure.
Answer:
Explanation:
Let h be the height .
initial velocity in first case u = 0
final velocity v = 6 m /s
acceleration due to gravity g = 9.8 m /s²
v² = u² + 2 g h
6² = 0 + 2 x 9.8 x h
h = 1.837 m .
For second case u = 3 m /s
v² = u² + 2 gh
= 3² + 2 x 1.837 x 9.8
= 9 + 36
= 45 m
v = 6.7 m /s
