A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. This is because

The coolie is not applying force on the load

No worries! We‘ve got your back. Try BYJU‘S free classes today!

The load is stationary

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Force and displacement are parallel to each other

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Force and displacement are perpendicular to each other

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D
Force and displacement are perpendicular to each other

The work is said to be done only when there is a displacement of a body in the direction of force. As displacement is normal to the direction of force, θ = 90°, thus W = F.s. cos 90° = F.s.0 = 0

Suggest Corrections

Similar questions

A coolie X carrying a load on his head climbs up a slope and another coolie Y carrying the identical load on his head moves the same distance on a frictionless horizontal platform. Who does more work? Explain the reason.

Q. A coolie

X

carrying a load on his head climbs up on slope and another coolie

Y

carrying the identical load on his head moves the same distance on a friction less horizontal platform. Who does more work?

Q. A constant force

\to F = 2^i - 3^j +^k

is applied on a ball to displace it from

_{1} =^i +^j

_{2} = 4^i + 3^j

, which of the following statements is true?

Q. A porter carrying a load on his head on a horizontal road does no work against _______.

Q. When a porter moves on a railway platform, the work done on the load on his head is zero because the force applied on the load is in the upward direction but displacement it is in the horizontal direction. However the Porter is applying a force on the ground to move forwards, taking the load as a part of the Porter (since it touches him )the work done shouldn't be zero. Please explain the flaw in my concept in detail.

Join BYJU'S Learning Program

A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. This is because

The correct option is D Force and displacement are perpendicular to each otherThe work is said to be done only when there is a displacement of a body in the direction of force. As displacement is normal to the direction of force, θ = 90°, thus W = F.s. cos 90° = F.s.0 = 0

The correct option is D
Force and displacement are perpendicular to each other

The work is said to be done only when there is a displacement of a body in the direction of force. As displacement is normal to the direction of force, θ = 90°, thus W = F.s. cos 90° = F.s.0 = 0