A car starting from rest accelerates at a rate of 7.5 m/s2. What is its final speed at the end of 4.0 seconds?
1 answer:
Step-by-step explanation:
initial velocity is 0
time is 4 seconds
acceleration is 7.5mper second square
using the formula s=ut+1/2at^2[distance equal to initial velocity times time plus half into acceleration times (time )squared] substitute s=0×4+2×7.5 ×4^2
s=0+7.5×16
s=120m
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