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Ali73 · Jan 27, 2011, 10:35 AM

The catapult of the aircraft carrier USS Abraham Lincoln accelerates an F/A-18 Hornet jet fighter from rest to a takeoff speed of 173 mi/h in a distance of 307ft . Assume constant acceleration.
a.)Calculate the acceleration of the fighter in m/s^2.
b.)Calculate the time required for the fighter to accelerate to takeoff speed.

ebaines · Jan 27, 2011, 03:07 PM

Use the basic equations of motion:

a) $v_f^2-v_i^2=2ad<br />$
Here $v_f$ = 173 mi/hr, $v_i$ = 0, and $d$ = 307 ft. You will have to convert the velocity from miles per hour to meters per second, and the distance from feet to meters.

b) Use $v_f = at$ . You were given $v_f$ and found $a$ in (a), so you can solve for $t$ . Again, make sure all units are in meters and seconds.