Question

A particle moves from point (2m, 5m, 7m) to (4m, 7m, 11m) under action of a force F = (21+31 + 7k) N, find work done by this V force​

Answer 1

Answer:

Solution

verified

Verified

Given

r

1

=2

i

^

+3

j

^

r

2

=3

i

^

+2

j

^

So, displacement vector is given by,

r

=

r

1

−

r

2

⇒

r

=(3

i

^

+2

j

^

)−(2

i

^

+3

j

^

)=

i

^

−

j

^