Question

which has greater deceleration, a bicycle slowing from 3 m/s to a stop in 6 seconds or a car slowing from 20 m/s to 15 m/s in 6 seconds

Answer 1

Answer on Question #48758 - Physics - Mechanics | Kinematics | Dynamics

1. Which has greater deceleration, a bicycle slowing from $3\mathrm{m / s}$ to a stop in 6 seconds or a car slowing from $20\mathrm{m / s}$ to $15\mathrm{m / s}$ in 6 seconds?

Let evaluate the quantities: $a_1 = \frac{0 - 3}{6} = -0.5\left(\frac{m}{s^2}\right), a_2 = \frac{15 - 20}{6} \approx -0.83\left(\frac{m}{s^2}\right).$

So, a car decelerates faster.

Answer: the deceleration of a car is greater.

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