A Block of Mass M Sits at Rest on a Rough

question 86

Multiple Choice

A block of mass m sits at rest on a rough inclined ramp that makes an angle θ with the horizontal.What must be true about normal force F on the block due to the ramp?

• A)F > mg
• B)F > mg cos θ
• C)F > mg sin θ
• D)F = mg cos θ
• E)F = mg sin θ

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Definitions:

Planetary Gearset

a compact, high-torque gear system where the central gear (sun gear) drives multiple outer gears (planet gears) which in turn drive a ring gear.

Ring Gear

A large circular gear that engages with a smaller, driving gear or pinion, often found in the differential of a vehicle.

Sun Gear

A central gear around which planetary gears revolve in an automatic transmission or differential, part of a planetary gear set.

Planetary Carrier

A component within a planetary gear system that holds one or more gears in place as they orbit the central sun gear, distributing torque and rotation.