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5. A car moves with speed 60 km/h for 1 hour in eastdirection and with same speed for 30 min in southdirection. The displacement of car from initialposition is(1) 60 km(2) 30 sqrt3 km(3) 30 sqrt5 km(4) 60 sqrt2 km

Answer»

Given:speed = 60km/hrTime (t1)= 1hr , time(t2)=30min= 30/60= 1/2 hr

Distance travelled by a car in East direction(s1)= speed× t1 = 60× 1= 60km

Distance travelled by a car in south direction(s2)= speed× t1 = 60×1/2= 30 km

Displacement from intial position(s)= √(s1)²+(s²)²= √ (60)²+(30)²= √3600+900= √900(4+1)= 30√5Displacement= 30√5km__________________



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