# CIE Physics

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Thread starter 3 weeks ago
#1
Is time a vector or scalar quantity? Why?
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3 weeks ago
#2
(Original post by Vertigo3729)
Is time a vector or scalar quantity? Why?
As far as we know, a scalar. Because it's one dimensional.
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Thread starter 3 weeks ago
#3
(Original post by RogerOxon)
As far as we know, a scalar. Because it's one dimensional.
True, but I was solving a past paper question the other day (which I will attach below):
When a force F moves its point of application through a displacement s in the direction of the force, the work W done by the force is given by W = F s.
How many vector quantities and scalar quantities does this equation contain?
A one scalar quantity and two vector quantities
B one vector quantity and two scalar quantities
C three scalar quantities
D three vector quantities

According to the mark scheme, the correct answer is A. We know energy/work done is a scalar, so the remaining two (force and time) have to be vectors.
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3 weeks ago
#4
(Original post by Vertigo3729)
True, but I was solving a past paper question the other day (which I will attach below):
When a force F moves its point of application through a displacement s in the direction of the force, the work W done by the force is given by W = F s.
How many vector quantities and scalar quantities does this equation contain?
A one scalar quantity and two vector quantities
B one vector quantity and two scalar quantities
C three scalar quantities
D three vector quantities

According to the mark scheme, the correct answer is A. We know energy/work done is a scalar, so the remaining two (force and time) have to be vectors.
The remaining two are force and displacement. Both are vectors.
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Thread starter 3 weeks ago
#5
(Original post by Stonebridge)
The remaining two are force and displacement. Both are vectors.
Oh, my bad. I read the question wrong. Thanks!
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