Question

7. Taking force, length and time to be the fundamental
quantities find the dimensions of
(a) density,
(b) pressure,
(c) momentum and
(d) energy​

Answer 1

Explanation:

Since Density is

Volume

Mass

.

So we can express mass=

acceleration

Force

=Force×

displacement.

time

2

So density will be,

Density=

displcement×length×length×length

force×time×time

So the dimension will be [F

1

T

2

L

−4

]

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Answer 2

Density:ML^-3

Pressure:ML^-1T^-2

energy:ML^2T^-2