A car start from rest and acquire a velocity of 54 km/h in 2 sec. The acceleration and
distance travelled by the car is:
(a) 7.15m/s2
,15m
(b) 7.5m/s2
,25m
(c)7.5m/s2
,15m
(d) 8.5m/s2
,25m
Answers
Answered by
1
Answer:
(a) 7.15m/s2 ,15m answer i ges
Answered by
1
Answer:
(c)
Explanation:
given
=> v = 54km/h= 54×5/18= 15 m/sec
=> u= 0 , t= 2 sec, a= ?, s= ?
since, v= u+at
=> 15= 0+a×2. => acceleration (a)= 7.5 m/sec²
since, v²= u²+2as => 15²= 0²+2×7.5×s
=> s= 15×15. / 15= 15 metre
=> a= 7.5 m/sec² s = 15m
option (c) 7.5m/s² , 15m is ans
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