Question

there are four graphs a, b, c, d. the x - axis of all graphs is time (sec). the y - axis of graph a is distance (meters), graph b is speed (meters/sec), graph c is speed (meters/sec), graph d is speed (meters/sec). the question is about which graph represents the motion of an object moving at a constant speed? the options are a, b, c, d with radio buttons.

Explanation:

To determine the graph representing an object moving at a constant speed, we analyze each option:

• Graph A: Shows distance decreasing linearly with time (deceleration to rest), not constant speed.
• Graph B: Shows speed near zero (object at rest or negligible motion), not constant speed.
• Graph C: Shows speed (y - axis) constant over time (horizontal line), meaning the object’s speed does not change—this represents constant speed.
• Graph D: Shows speed increasing linearly with time (acceleration), not constant speed.

Answer:

C. $\bigcirc$ C