Question

A rocket-driven sled Sonic Wind No. 2, is used for investigating the physiological effects of large accelerations on people. It runs on a straight, level track. Starting from rest, it can reach a speed of 250 m/s in a time 2s with approximately constant acceleration.What is the best single equation?

Answer 1

Answer:

The best single equation in order to fin the acceleration is

$a=v_f/t=250/2=125m/s^2$

Explanation:

The best single equation in order to find the acceleration is the following kinematics equation:

$v_f=v_o+at$

As the rocket start from the rest, the initial velocity value is zero. Then the acceleration value is:

$a=v_f/t=250/2=125m/s^2$