Posted by **Hannah** on Monday, February 6, 2012 at 6:32pm.

n boat starts from rest and accelerates at a constant rate to a final speed of 28 m/s over a distance of 780 m. How much time will this take?

- physics -
**bobpursley**, Monday, February 6, 2012 at 7:33pm
Vf^2=Vi^2+2ad

solve for a, then..

28=at solve for t.

- physics -
**bobpursley**, Monday, February 6, 2012 at 7:34pm
actually, there is an easier way. Avg velocity is 14m/s

time to travel= distance/avgvelocity

## Answer This Question

## Related Questions

- Physics - A sailboat starts from rest and accelerates at a rate of 0.18 m/s2 ...
- Physics - A sailboat starts from rest and accelerates at a rate of 0.12 m/s 2 ...
- Physics - A sailboat starts from rest and accelerates at a rate of 0.12 m/s2 ...
- Physics - Help!?!?! A pontoon boat starts from rest and accelerates at a ...
- Physics - A power boat of mass 495 kg is cruising at a constant speed of 8.9 m/s...
- Physics - Sam is taking his girlfriend Sally out for a ride in his boat. He ...
- Physics - A power boat of mass 475 kg is cruising at a constant speed of 8.9 m/s...
- Physics - A speedboat starts from rest and accelerates at +1.98 m/s2 for 8.25 s...
- Physics - A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.05 s...
- AP PHYSICS - A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.15...

More Related Questions