# Acceleration Problem

1. A plane traveling at 10km/hr lands on an aircraft carrier and stops in 25.0m
A. Find the acceleration in m/s^2
B. Find the time it took to stop in seconds

## Homework Equations

1km/hr = .278 m/s

## The Attempt at a Solution

100(.278)= 27.8 m/s
A. 25-27.8 = 2.8 m/s
B. 8.92 seconds (25/2.8)

Is this anywhere near correct? something seems wrong.

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Homework Helper
1. A plane traveling at 10km/hr lands on an aircraft carrier and stops in 25.0m
A. Find the acceleration in m/s^2
B. Find the time it took to stop in seconds

## Homework Equations

1km/hr = .278 m/s

## The Attempt at a Solution

100(.278)= 27.8 m/s
A. 25-27.8 = 2.8 m/s
B. 8.92 seconds (25/2.8)

Is this anywhere near correct? something seems wrong.
When you converted to m/s you used 100km/h instead of 10km/h.

I don't understand how you did part A and B... seems like you're mixing up distance, speed and acceleration.

Remember the plane is undergoing a constant deceleration (or a negative acceleration) and coming to a stop over 25m.

Part A and B involve direct use of kinematics equations... you should have studied these... Can you think of a kinematics equation you can apply in part A? You're trying to find acceleration... you know the distance, the initial velocity, and the final velocity. There's an equation you can use.

Dick