The velocity of car changes from 36km/hr to 90 km/hr in 20 sec. Find change in velocity in m/(sec) 2.
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initial velocity (u)=36 km/h
final velocity (v)=90km/h, time (t)=20sec
change in velocity in m/s^2 I.e acceleration (a)= v-u/t
=(90-36/20)m/s^2
=( 27/10 )m/s^2
=2.7 m/s^2
final velocity (v)=90km/h, time (t)=20sec
change in velocity in m/s^2 I.e acceleration (a)= v-u/t
=(90-36/20)m/s^2
=( 27/10 )m/s^2
=2.7 m/s^2
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2
Explanation:
- initial velocity =36km/hr =36(5/18) m/s =10 m/ s
- final velocity= 90 km/ht =90(5/18) m/s=25m/s
- time= 20 seconds
- a=v-u/t =25-10/20=15/20 =0.75 m/s
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