Describe the ratio of kinetic energy and potential energy the skateboarder will have at each of the following points in her ride
. Also, explain how the mechanical energy changes throughout the ride if there are no non-conservative forces acting on the system.
- at the top of the ramp
- a quarter of the way down the ramp
- halfway down the ramp
- three-quarters of the way down the ramp
- at the bottom of the ramp
Be sure to support your response with evidence from the text.
- at the top of the ramp
- a quarter of the way down the ramp
- halfway down the ramp
- three-quarters of the way down the ramp
- at the bottom of the ramp
Be sure to support your response with evidence from the text.
1 answer:
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Answer:
Explanation:
Average velocity is defined as the ratio of total displacement of the motion and total time taken in that motion
here we know that initially the sky diver drops without opening parachute by total displacement 625 m
then she open her parachute and drop another 362 m
so first it took time t = 15 s to drop without open parachute
then it took t = 139 s to drop next displacement
so here total displacement is given as
total time is given as
so average velocity is given as
Answer:
The angular velocity is
Explanation:
From the question we are told that
The mass of each astronauts is
The initial distance between the two astronauts
Generally the radius is mathematically represented as
The initial angular velocity is
The distance between the two astronauts after the rope is pulled is
Generally the radius is mathematically represented as
Generally from the law of angular momentum conservation we have that
Here is the initial moment of inertia of the first astronauts which is equal to
the initial moment of inertia of the second astronauts So
Also is the initial angular velocity of the first astronauts which is equal to
the initial angular velocity of the second astronauts So
Here is the final moment of inertia of the first astronauts which is equal to
the final moment of inertia of the second astronauts So
Also is the final angular velocity of the first astronauts which is equal to
the final angular velocity of the second astronauts So
So
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