Question

a particle is moving along
a= 3i + 4j + 5k,
then it's motion will be
i) 1D
ii) 2D
iii) 3D
iv) none
and why? (please explain in detail)​

Answer 1

Explanation:

Given Force,

F

=3

i

^

+4

y

^

Displacement of the particle, from given coordinates :

Δ

r

=

r

f

−

r

i

=(3

i

^

+0

j

^

)−(2

i

^

+3

j

^

)

⇒Δ

r

=(

i

^

−3

j

^

)m

So, work done by force

w=

F

.A

r

=(3

i

^

+4

j

^

).(

i

^

−3

j

^

)

⇒w=−9

j

^