Question

A 1 kg water rocket applies a force of 5N for 2 seconds. The rocket starts from rest. What is

the final speed of the rocket?

Answer 1

The final speed of the rocket is 10 m/s.

Step-by-step explanation:

To find the final speed of the rocket, we can use the equation:

Final speed = Initial speed + (Acceleration imes Time)

Since the rocket starts from rest, the initial speed is 0 m/s. The force applied by the rocket is given as 5N, and the mass of the rocket is 1 kg. We can use Newton's second law, F = m imes a, to find the acceleration:

Acceleration = Force / Mass

Acceleration = 5N / 1kg = 5 m/s^2

Now we can substitute the values into the first equation:

Final speed = 0 + (5 m/s^2 imes 2s)

Final speed = 10 m/s