Posted by **shirley** on Tuesday, September 29, 2009 at 1:10am.

an airplane has a takeoff speed of 80 meters per second which it reaches 35 seconds after starting from rest. What is the minimum length of the runway?

- physics -
**jim**, Tuesday, September 29, 2009 at 5:20am
Start by calculating the acceleration of the plane as it moves from rest to take-off. It gets up to 80 m/s in 35 seconds, so its acceleration is 80/35 m/s^2.

Now you can just plug in the formula for distance travelled under acceleration = ut + 0.5at^2.

Initial velocity u is zero. We've worked out the acceleration, and we know that t=35sec. The rest is easy.

## Answer this Question

## Related Questions

- Physics - An airplane can reach a takeoff speed of 45 m/s (from rest) in 7.0 ...
- College Physics - A 1200 kg airplane starts from rest and with a constant ...
- Math - There is a mathematical relationship between an airplane’s weight x and ...
- math - Sue is in an airplane which travels at a constant 300 kilometers per hour...
- physics - To take off from the ground, an airplane must reach a sufficiently ...
- Physics - A jet plane has a takeoff speed of Vto=125km/h (34.72 m/s) and it's ...
- Physics - There's 2. 1) A 1200-kg airplane starts from rest and, with a constant...
- physics - A 20000 kg airplane takes off by traveling 300 m down a runway while ...
- physics - A jet needs to reach a takeoff speed of 75.0 m/s. If the runway is ...
- Physics - The hare and the tortoise are at the starting line together. When the ...