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Selina Solutions Class 9 Physics Solutions for Exercise 2C in Chapter 2 - Chapter 2 Motion In One Dimension
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A car starting from rest accelerates uniformly to acquire a speed 20km/h in 30 min. The distance travelled by car in this time interval will be:
(a) 600km
(b) 5km
(c) 6km
(d) 10km
Answer:
(b) 5km
v = u + at
20 = 0+ a(1/2)
a = 40km/h
S = ut + ½ at.t
= 0(1/2) + ½ (40)(0.25)
= 0+5 = 5km
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