Thanks for your inputs. I too thought "perpendicular to the horizontal" meant that the mechanical arm was vertical (with the cart and its passengers upside down). What I didn't realize was that the line of the gravitational force is acting at the pivot point, meaning that there is zero force...
The problem is based off a passage. The passage along with the answer choices are uploaded.
With a full carriage, the second ride suffers a power outage with the mechanical arm perpendicular to the horizontal. How much torque must the mechanical arm provide in order to prevent the...
Question says: A person is pulling on a block of mass m with a force equal to its weight directed 30° above the horizontal plane across a rough surface, generating a friction f on the block. If the person is now pushing downward on the block with the same force 30° above the horizontal plane...