physics.....help?

0 ⤊

if an car is able to acceralate at a rate of about 1.6m/s^2 how long does it take to acceralate from 80km/h to 110km/h

2007-09-28 14:53:42 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics

delta V = a*t so
delta V = 110-80 = 30 km/hr = 8.333 m/s
If it accelerates at 1.6 m/s² then
t = 8.333/1.6 = 5.208 s.

Doug

2007-09-28 15:15:25 · answer #1 · answered by doug_donaghue 7 · 0⤊ 0⤋

The difference is 30 kph, convert to metres/sec and divide by the acceleration to get time in seconds.

2007-09-28 22:13:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋

a = [v-u ] / t
1km/h = 10 /36 m/s
t = [110 - 80 ] [10 / 36] / 1.6
= 5.2 s.

2007-09-28 22:28:32 · answer #3 · answered by Pearlsawme 7 · 0⤊ 0⤋