A particle moves from a point (-2hat(i) +5hat(j)) "to" (4 hat(j) +3 hat(k)) .When a force of (4hat(i) +3hat(j))Nis applied.How much workhas been by the force ?

A particle moves from a point (-2hat(i) +5hat(j)) "to" (4 hat(j) +3 ha

1.	A particle moves from a point (-2hat(i) +5hat(j)) "to" (4 hat(j) +3 hat(k)) .When a force of (4hat(i) +3hat(j))Nis applied.How much workhas been by the force ?
Answer» 5 J 2J 8 J 11 J Solution :`W = vec(F ) . d vec(s) ` `d vec(s) = (4 hat(j) +3 hat(K)) - (-2hat(i) + 5 hat(j))` `= + 2 hat(i) - hat(j) =3 hat(k)` ` :. W = (4hat(i) +3hat(j)).(2hat(i)-hat(j) +3hat(k))` ` = 8-3 +0` ` :. W = 5J `