Question

robs uncle took him to a motocross stunt show. one biker rode up a ramp from the ground and launched into the air, did a flip with his bike, then landed on another ramp and rode back down to the ground. which graph could show the bikers height above the ground over time?

Explanation:

Step1: Analyze the biker's motion

The biker starts on the ground (height = 0), rides up a ramp so height increases, then launches into the air and reaches a maximum height, after that comes down and lands on another ramp (height decreases but not to 0 immediately), and then rides back down to the ground (height decreases to 0).

Step2: Evaluate each graph

The first graph has the height going down first which is incorrect. The second graph does not show the biker coming back down to the ground properly. The fourth graph has an unrealistic loop - like shape. The third graph shows the height increasing from 0 (starting on the ground), reaching a peak (in the air), then decreasing as the biker lands on the other ramp and finally decreasing to 0 as the biker rides back to the ground.

Answer:

The third graph (the one with height increasing from 0, reaching a peak and then decreasing back to 0)