a body is having an acceleration of - 4 metre per second square. when speed changes from 54 km per hour to 118 per hour .find the time interval for the change in speed?
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acceleration a=4m/s²
initial velocity u=54km/h=15m/s
final velocity v =118km/h=32.77m/s
let the time = t sec
using Newton law of motion,
v=u + at
t= v-u/a
t=32.77-15/4
t =17.77/4
t=4.44sec.
initial velocity u=54km/h=15m/s
final velocity v =118km/h=32.77m/s
let the time = t sec
using Newton law of motion,
v=u + at
t= v-u/a
t=32.77-15/4
t =17.77/4
t=4.44sec.
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