A firework rocket starts from rest at ground level and moves vertically. In the first 3s of its motion, the rocket rises 27 m . The rocket is modelled as a particle moving with constant acceleration 6ms^-2 Find the speed of the rocket 3 s after it has left the ground.

Question

A firework rocket starts from rest at ground level and moves vertically. In the first 3s of its motion, the rocket rises 27 m . The rocket is modelled as a particle moving with constant acceleration 6ms^-2 Find the speed of the rocket 3 s after it has left the ground.

Answer 1

Using the provided values in the equation,

, we obtain \(v = 0 + (6 m/s² * 3 s) = 18 m/s\), which is the speed of the rocket 3 seconds after leaving the ground.

Answer 2

## Step1: The problem is looking to find the speed of the rocket 3 seconds from the launch.In this case the initial speed (

) is 0 m/s, as mentioned in the problem, the rocket starts from rest. The time (

) is taken as 3 seconds and the acceleration (

) is given to be 6 m/s². We are not utilizing the distance in this problem to solve for requested speed; it is surplus information for this enquiry.## Step2. Apply the first law of motion to find the speed at 3 seconds,

.

Question

A firework rocket starts from rest at ground level and moves vertically. In the first 3s of its motion, the rocket rises 27 m . The rocket is modelled as a particle moving with constant acceleration 6ms^-2 Find the speed of the rocket 3 s after it has left the ground.

Answer

Answer

Explanation