Answer:
Approximately .
Explanation:
At a speed of , the kinetic energy of the ride and the riders of mass (combined) would be:
.
If friction is negligible, would be the work required to achieve this speed. That is:
.
Given that this work was completed in a duration of , the average power would be:
.
Substitute in , , and :
.
(Note that if acceleration is constant, the power input to the ride would be proportional to . The average power of input to the ride would be a quarter of the peak power input. Multiplying average velocity (proportional to ) by average force (proportional to ) would overestimate the average power by .)
Answer:
-33.8 m/s & -58.3 m
Explanation:
We have two known variables from the start: acceleration and time. Since Amelia is in free-fall, the acceleration is due to gravity (g = 9.8 m/s²). We want to find her final velocity and displacement after 3.45 seconds.
Let's start by finding displacement assuming her final velocity is -33.8 m/s.
Using this kinematic equation:
Substitute the known variables into the equation. Assuming the downwards direction is negative:
- Δx = (-33.8)(3.45) - 1/2(-9.8)(3.45)²
- Δx = -116.61 + 58.32225
- Δx = -58.28775
If Amelia's final velocity is -33.8 m/s, then her displacement is -58.3 m.
This eliminates the second and fourth choice, because the displacement would not match up with her final velocity.
The third choice does not make sense because if her final velocity was negative, her displacement would not be positive.
Therefore, the correct answer is choice A: -33.8 m/s & -58.3 m.
Absolute zero is not about numbers. It's about temperature, and the
motion of molecules in gases.
You know that the temperature we feel with our skin is the result of the
average speed of all the tiny molecules zipping around or vibrating in
the solid, liquid, or gas.
The faster they're all moving, the warmer the substance feels to us.
The slower they're all moving, the cooler the substance feels to us.
When molecules slow down to zero and lose all of their kinetic energy,
that temperature is what we call 'absolute zero' ... if they're not moving
at all, then they can't move any slower.
I am almost sure it is frequency :)
I hope this helps!
Answer:
Mechanical advantage = 5
Explanation:
Given the following data;
Output force = 500N
Input force = 100N
To find the mechanical advantage;
M.A = 5