Question

1. match the description with the speed vs. time graph.

a. at rest
b. constant speed
c. slower acceleration
d. deceleration
e. faster acceleration

Explanation:

Step1: Analyze 'At rest'

When an object is at rest, its speed is 0. On a speed - time graph, this is represented by a horizontal line at speed = 0.

Step2: Analyze 'Constant speed'

A constant speed means the speed does not change with time. So, it is a horizontal line on the speed - time graph (non - zero if the object is moving).

Step3: Analyze 'Slower acceleration'

Acceleration is the rate of change of speed. A slower acceleration means the speed is increasing at a slower rate. On a speed - time graph, this is a line with a relatively small positive slope.

Step4: Analyze 'Deceleration'

Deceleration is when the speed is decreasing. On a speed - time graph, this is a line with a negative slope.

Step5: Analyze 'Faster acceleration'

Faster acceleration means the speed is increasing at a faster rate. On a speed - time graph, this is a line with a relatively large positive slope.

Answer:

A. A horizontal line at speed = 0 on the graph represents an object at rest.
B. A non - zero horizontal line on the graph represents constant speed.
C. A line with a small positive slope represents slower acceleration.
D. A line with a negative slope represents deceleration.
E. A line with a large positive slope represents faster acceleration.