Question

A car moves with speed 60 km/h for 1 hour in east
direction and with same speed for 30 min in south
direction. The displacement of car from initial
position is
(1) 60 km
(2) 30/3 km
(3) 30V5 km
(4) 6012 km​

Answer 1

Answer:

30rt5

option 3

Explanation:

Given that,

Speedv=60km/h

Time

  t1=1h

 t2=30min

Now, distance travelled by a car in East direction

  D1=v×t1

 D1=60×1

 D1=60km

Now, distance travelled by a car in south direction

  D2=v×t2

 D2=60×21

 D2=30km

Now, the displacement from intial position

  D=(D1)2+(D2)2

 D=(60)2+(30)2

 D=3600+900

 D^2=4500

 D=30rt5

Hence, the displacement of car from initial position is 30 rt 5

Answer 2

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