a motion map for a motorcycle is shown. at which second does the motorcycle start to have positive…
a motion map for a motorcycle is shown. at which second does the motorcycle start to have positive acceleration? 1 2 3 4
Answer
Explanation:
Step1: Understand acceleration on motion - map
Acceleration is positive when velocity vectors increase in length or change direction in the positive - x direction.
Step2: Analyze each second
At (t = 1) and (t = 2), the motorcycle is moving in the negative x - direction with decreasing speed (negative acceleration). At (t = 3), the motorcycle changes direction from negative to positive x - direction. This change in direction and the start of motion in the positive x - direction implies positive acceleration.
Answer:
3