A uniform force of (2hat(i)+hat(j)) N acts on a particle of mass 1 kg. The particle displaces from position (3hat(j)+hat(k)) m to (5hat(i)+3hat(j)) m. The work done by the force on the particle is

A uniform force of (2hat(i)+hat(j)) N acts on a particle of mass 1 kg.

1.	A uniform force of (2hat(i)+hat(j)) N acts on a particle of mass 1 kg. The particle displaces from position (3hat(j)+hat(k)) m to (5hat(i)+3hat(j)) m. The work done by the force on the particle is
Answer» 9J 6J 10 J 12J Solution :`VECF= ( 2hati + hatj )N ,Deltavecr= vecr_2- vecr_2= ( 5 hati+ 3hatj ) -( 3 hati + HATK ) , Deltavecr = 5 hati- hatk ` workdone ,` barW= vecF .Deltavecr= ( 2 hati+ hatj ).( 5 hati- hatk ) ` `barW = 10hatiW= 10 Nm= 10 J`