Physics

To find the total distance covered by the runner, we can break the motion into three phases: acceleration, constant speed, and deceleration.

 

Phase 1: Acceleration

Initial velocity = 0 m/s

Final velocity = 12 m/s

Time = 6 s

 

Using the formula for acceleration:

 

Now, calculate the distance during this phase:

 

Phase 2: Constant Speed

During this phase, the runner travels at a constant speed of 12 m/s for 10 seconds:

 

Phase 3: Deceleration

Initial velocity = 12 m/s

Final velocity = 0 m/s

Time = 4 s

 

Calculate the deceleration:

Click "Show Answer" to reveal the answer and analysis