Question

simple machines
which inclined plane would require the least amount of force to move the box?
j. inclined plane a
k. inclined plane b
l. inclined plane c
m. the amount of force applied would be the same for all.
q3

Explanation:

Step1: Recall force - inclined plane relationship

The force required to move an object up an inclined plane (neglecting friction) is given by $F = mg\sin\theta$, where $m$ is the mass of the object, $g$ is the acceleration due to gravity and $\theta$ is the angle of the inclined plane with the horizontal. The smaller the angle $\theta$, the smaller the value of $\sin\theta$ and thus the smaller the force $F$.

Step2: Analyze the angles of the given inclined planes

Inclined plane A has the smallest angle among planes A, B and C. Since $\sin\theta$ is a function that increases with $\theta$ for $0\leq\theta\leq90^{\circ}$, for a given mass $m$ and $g$, the force $F$ will be smallest for the plane with the smallest angle.

Answer:

J. inclined plane A