Why is reaching activation energy necessary?

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

In an experiment, how can i change human errors? be specific.