Question 4
EasyOriginal questionWhich of these is a vector quantity, one that needs a direction as well as a size?
Show the answer and explanation
CorrectNot quiteAnswer A
Correct answer: A
Explanation
Velocity is speed in a stated direction, such as 20 m/s towards the east.
Speed, mass and temperature have only a size, so they are scalars.
Worth noting
Speed and velocity are the pair most often confused: speed has no direction.
- Concept
- Scalars and vectors
- Typical timeTypical
- 35 s
- Your timeYours
- —
Practise this chapter →
Ten questions from Everyday Physics, at your own pace.