Monday

September 1, 2014

September 1, 2014

Posted by **sam** on Friday, September 14, 2012 at 11:09pm.

What average acceleration must the plane's engines provide if it is to take off safely from its airport?

Answer in units of m/s^2.

- physics -
**sam**, Friday, September 14, 2012 at 11:14pmHighway safety engineers build soft barriers so that cars hitting them will slow down at a soft rate. A person wearing a safety belt can withstand an acceleration of 300m/s^2.

How thick should barriers be to safely stop a car that hits the barriers at 92.8km/h?

Answer in units of m.

- physics -
**drwls**, Saturday, September 15, 2012 at 1:06amV = sqrt(2 a X)

V is the speed that must be attained

a is the acceleration

X is the distance required

Solve for a.

**Answer this Question**

**Related Questions**

physics - An airport has runways only 132 m long. A small plane must reach a ...

phyics - An airport has runways only 184 m long. A small plane must reach a ...

physics - An airport has runways only 142 m long. Asmall plane must reach a ...

physics - A Boeing 787 is initially moving down the runway at 3.0 m/s preparing ...

Physics - An engineer is designing a runway for an airport. Several planes will ...

physics- pls help me - 1. The driver of a car slams on the brakes when he sees a...

Physics - A jet plane lands with a speed of 110 m/s and can accelerate with a ...

Physics - A jet plane has a takeoff speed of Vto=125km/h (34.72 m/s) and it's ...

physics - An airplane needs at least 145 meters of runway to take off. If the ...

Calculus - A pilot wishes to reach an airport 350 Km due east from his present ...