Question

An automobile driver increases the speed
at a
constantrate from 25 km/h to
55 km/h in 0.50 min. A bicycle rider
speeds up at a constantrate from rest
to 30km/h in 0.50 min. calculate their
accelerations.​

Answer 1

Answer:

Please see the explanation bro/sis.

Step-by-step explanation:

let initial velocity of automobile = $u_{1}$

let final velocity of automobile = $v_{1}$

let initial velocity of bicycle = $u_{2}$

let final velocity of bicycle = $v_{2}$

$u_{1} = 25km/h = 6.9m/s\\v_{1} = 55km/h = 15.3m/s(approx)\\t = 0.5min = (0.5*60)s = 30s\\a = \frac{v_{1}-u_{1}}{t}\\a = \frac{15.3-6.9}{30} \\a = 0.28m/s^{2}$

$u_{2} = 0m/s\\v_{2} = 30km/h = 8.3m/s\\t = 0.50 min = 30s\\a = \frac{v_{2}-u_{2}}{t} \\a = \frac{8.33-0}{30}\\a = 0.27 m/s^{2}$

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