Question

a bike of mass 140 kg is moving with velocity 45ms-1 calculate the force required to stop the bike if it travels 10 m on the application of brakes​

Answer 1

Answer:

F=ma

Let’s collect the givens (and identify the unknown as “F” for force):

Distance is 50 m

Mass (m) is 1,000 Kg (i.e., a metric ton)

Initial velocity vi is 20 m/s

Final velocity vi is zero

The deceleration is a velocity change of -20 m/s (which over a distance of 50 m), but we don’t know the time (t) over which it occurs.

Assuming the acceleration (or negative deceleration) was constant, the average velocity was 10 m/s, so the time to travel 50m was 5 seconds Therefore the acceleration was:

−20ms÷5s

Answer 2

Answer:

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