Question
A car is moving at 25m/s north.Which of the following is a vector quantity? A. the speed of the car B. the velocity of the car C. the potential energy of the car D. the distance traveled by the car
Answer
4
(181 Votes)
Iain
Professional · Tutor for 6 years
Answer
B. the velocity of the car
Explanation
## Step 1:We first need to understand the difference between scalar and vector quantities. Scalar quantities are quantities that can be fully described by a magnitude or numerical value only. They include size, speed, mass, volume, and time. Vector quantities are quantities that include direction and magnitude for full description. They include velocity, acceleration, and displacement.## Step 2:We then apply this understanding to the options given in the question. ### A. The speed of the car: Speed is a scalar quantity as it only involves magnitude (how fast the car is moving) and does not include any direction.### B. The velocity of the car: Velocity is a vector quantity as it includes both magnitude (how fast the car is moving) and direction (in this case, north).### C. The potential energy of the car: Potential energy is a scalar quantity as it only involves magnitude (the amount of energy the car has) and does not include any direction.### D. The distance traveled by the car: Distance is a scalar quantity as it only involves magnitude (how far the car has traveled) and does not include any direction.