Very Short Question and Answers - Work Done by Constant Force

Work is defined as the product of the force and the displacement in the direction of the force.

The work done (W) is calculated using the formula W = F × s, where F is force and s is displacement.

The unit of work is the newton metre (N m), which is also known as a joule (J).

1 J of work is done when a force of 1 N displaces an object by 1 m along the line of action of the force.

When the applied force is zero, the work done is also zero.

When the displacement is zero, the work done is also zero.

The work done is 5 N × 2 m = 10 J.

The work done is positive and equal to the product of the applied force and the displacement.

The work done is negative when the force acts in the opposite direction to the displacement.

The work done is 225 J, calculated using the formula W = mg × s.

Work done is positive when the force is in the direction of displacement, and negative when the force is opposite to the direction of displacement.

The work done in this scenario is negative as the force acts opposite to the direction of displacement.

The work done is 140 N × 15 m = 2100 J.

It means that the work done by the forces will be positive, as they assist in the displacement of the object.

Work done is a scalar quantity because it has only magnitude and no direction.

The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy.

If there is no displacement, the work done is zero regardless of the magnitude of the force applied.

The work done by gravity is positive as it acts in the direction of the object's displacement.

The force of gravity acts against the work done while lifting an object.

Quantifying work done is important to understand energy transfer, mechanical systems, and the effectiveness of forces in various applications.