Question

If the angle of an inclined plane is increased, making it steeper, how are its mechanical advantage and efficiency affected?

(1 point)
Responses

It increases mechanical advantage and decreases efficiency.
It increases mechanical advantage and decreases efficiency.

It decreases mechanical advantage and increases efficiency.
It decreases mechanical advantage and increases efficiency.

It decreases both mechanical advantage and efficiency.
It decreases both mechanical advantage and efficiency.

It increases both mechanical advantage and efficiency.
It increases both mechanical advantage and efficiency.

Answer 1

It decreases mechanical advantage and increases efficiency.

Reason: ideal MA = length/height, so making the plane steeper shortens the length and lowers MA. With friction, efficiency η = 1 / (1 + μ cotθ), and cotθ falls as θ increases, so efficiency rises.