a car accelerates by 50m/s. it would be attains a speed of 100km/h from rest, in a. 0.56 s b. 0.28s c. 2s.d. 1.12s
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acc=50m/s^2
initial speed =.u= 0
final speed =v= 100km/hr=100×5/18m/s =27.78m/s
using first equation of motion.
v=u+at
27.78=0+50t where t=time
t=27.78/50 =0.56sec
so it will attain speed of 100km/h in 0.56 sec that is a. option
initial speed =.u= 0
final speed =v= 100km/hr=100×5/18m/s =27.78m/s
using first equation of motion.
v=u+at
27.78=0+50t where t=time
t=27.78/50 =0.56sec
so it will attain speed of 100km/h in 0.56 sec that is a. option
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