A force of (3i^ + 4j^ ) N acts on a body and displaced it by (3i^+4j^) m The - Physics - Work Energy And Power

Question

A force of (3i^ + 4j^ ) N acts on a body
and displaced it by (3i^+4j^) m The work done
by the force is ------ option is --- zero / 12 joule / 25 joule/ 16
joule

Bapan Pathak · Accepted Answer

Hi Papu,
Let me show you how we should solve problems of this kind You
have the force and the displacement We know that the work done by a
force is equal to the dot product (or scalar product) of the force
and the displacement
We have,
<img width="628" height="271" src=
"https://s3mn%20mnimgs%20com/img/shared/userimages/mn_images/image/part9%20png"
alt="">
Do write back if you have any doubt or any confusion in any of
the steps
Keep posting and have a nice time!

A force of (3i^ + 4j^ ) N acts on a body and displaced it by (3i^+4j^) m. The work done by the force is ------ option is --- zero / 12 joule / 25 joule/ 16 joule.

A force of (3i^{^} + 4j^{^} ) N acts on a body and displaced it by (3i^{^}+4j^{^}) m. The work done by the force is ------ option is --- zero / 12 joule / 25 joule/ 16 joule.