Question

study the image of the roller coaster, then answer the questions. note that the arrows indicate the direction of the movement of the roller coaster train. which section (a or b) of the roller coaster shows positive acceleration? which section (a or b) of the roller coaster shows negative acceleration?

Explanation:

Step1: Understand positive and negative acceleration

Positive acceleration means the object's speed is increasing in the direction of motion. Negative acceleration (deceleration) means the object's speed is decreasing.

Step2: Analyze section A

In section A, the roller - coaster is moving downwards. Due to gravity, its speed is increasing in the direction of motion (downwards). So, it has positive acceleration.

Step3: Analyze section B

In section B, the roller - coaster is moving upwards. Gravity acts against the direction of motion, causing its speed to decrease. So, it has negative acceleration.

Answer:

Positive acceleration: A
Negative acceleration: B