A scooter starting from rest moves with a constant acceleration for a time Δ t 1 , then with a constant velocity for the next Δ t 2 and finally with a constant deceleration for the next Δ t 3 to

Question

A scooter starting from rest moves with a constant acceleration for a time $Δ t_{1}$ , then with a constant velocity for the next $Δ t_{2}$ and finally with a constant deceleration for the next $Δ t_{3}$ to come to rest. A 500 N man sitting on the scooter behind the driver manages to stay at rest with respect to the scooter without touching any other part. During which part of the journey is the horizontal friction exerted by the seat on the man zero?

Options:

Answer:

B

Solution:

Only during uniform motion is no horizontal force required; the seat then exerts just the 500 N normal reaction.
Option B.

TestHub · Accepted Answer

Only during uniform motion is no horizontal force required; the seat then exerts just the 500 N normal reaction. Option B.

Physics - NLM Question with Solution | TestHub

Options:

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