Is it true that the work done against gravity is zero. When a body is moved horizontally along a frictionless surface?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

True

False

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The above statement is true.
Work done against gravity when a body is moved horizontally along a frictionless surface is zero.
Work is said to be done when a force displaces a body up to some distance in the direction of the force. Its unit is

N - m

also, called

Joule (J)

. Mathematically,

Work done = F . s . cosθ

Where

F

is the force,

s

is the displacement of the body,

θ

is the angle between the direction of the force and the displacement of the body.
In the given condition, the Force of gravity acts vertically downward while the body moves horizontally. Thus, the angle between the direction of the Force of gravity and the distance is