Question

Work is said to be done by a force on a body if
(1) The body has displacement in the direction of
force
(2) The angle between force and displacement
vector is other than 90°
(3) The angle between force and displacement
vector is 90°
(4) Both (1) and (2)​

Answer 1

hi,
_______

Work is said to be done by a force on a body if the angle between force and displacement
vector is other than 90°.

________

:)

Answer 2

Answer:

(4)Both ( 1)and (2)

Explanation:

•Work done by a force is defined as the product of force and displacement of point of application of force in the direction of force .

• since A B cos 90 =0 the angle between force and displacement must be less than or greater than 90°.