A local shopping mall has just Installed moving sidewalks, which travel at a uni

Question

A local shopping mall has just Installed moving sidewalks, which travel at a uniform speed of 3 miles/hour (mph). You have a radio controlled car which has a top speed of 2 mph You sneak it into the mall and put It on the moving sidewalk When the car is moving at top speed in the same direction as the sidewalk, its speed, relative to a stationary person not on the sidewalk, is A mph When the car is moving at top speed in the opposite direction as the sidewalk, its speed, relative to a stationary person not on the sidewalk, is B mph. A = 5. B = 5 A = 3, B = 2 A = 0. B = 3 A = 3, B = 0 A = 2, B = 3 A = 5, B = 2 A = 6, B = 1

Explanation / Answer

Last option is correct

A = 3 + 2 = 5

B = 3-2 = 5 (the net motion of car is in the direction of sidewalk or opposite the direction in which car tends to move)

The relative velocities are added when in same direction or substract when in opposite direction

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