Which term refers to an agent or action that produces a change in direction and/or speed of a body's motion?

Which term refers to an agent or action that produces a change in direction and/or speed of a body's motion?

• A. Torque
• B. Velocity
• C. Acceleration
• D. Force

Answer: (D)

A force is a push or pull that makes a body change its motion, whether speeding up, slowing down, or turning. In skiing, gravity, grip from the snow, friction, and your edging actions act as forces that alter your speed and direction. Velocity is simply how fast and in what direction you’re moving right now, not what causes the change. Acceleration is the rate at which velocity changes—it's the effect you observe from the applied forces, not the agent itself. Torque is the turning effect of a force about an axis, which is more specific to rotation, not the general change in motion. So the agent that produces the change in direction and/or speed is force.

A force is a push or pull that makes a body change its motion, whether speeding up, slowing down, or turning. In skiing, gravity, grip from the snow, friction, and your edging actions act as forces that alter your speed and direction. Velocity is simply how fast and in what direction you’re moving right now, not what causes the change. Acceleration is the rate at which velocity changes—it's the effect you observe from the applied forces, not the agent itself. Torque is the turning effect of a force about an axis, which is more specific to rotation, not the general change in motion. So the agent that produces the change in direction and/or speed is force.