Question

which of the following is true about speed and velocity? choose 1 answer: a when an object is moving straight it has speed, not velocity. when its turning it has velocity, not speed. b speed and velocity mean exactly the same thing. c speed and velocity both tell you how fast an object is moving. d speed includes direction, but velocity doesnt.

Explanation:

• Option A: Incorrect. Both speed (scalar, magnitude) and velocity (vector, magnitude + direction) exist during straight or turning motion. An object moving straight has both speed and velocity (direction is straight), and when turning, it also has both (speed is magnitude, velocity has direction of motion at each point).
• Option B: Incorrect. Speed is a scalar (only magnitude), velocity is a vector (magnitude + direction). They are not the same.
• Option C: Correct. Speed (magnitude of how fast) and velocity (magnitude part tells how fast, with direction) both relate to the rate of motion (how fast an object is moving).
• Option D: Incorrect. Velocity includes direction, speed does not. Speed is just the magnitude of velocity.

Answer:

C. Speed and velocity both tell you how fast an object is moving.