Dc Pandey Physics Class 11 Pdf Download Part 1 Work [ Official × Breakdown ]

Now, we can calculate the work done:

A force of 10 N is applied to an object, causing it to move 5 m in the direction of the force. Calculate the work done.

where $W$ is the net work done and $\Delta KE$ is the change in kinetic energy. Let's consider some problems and their solutions:

where $v = 0$ (final velocity), $u = 4$ m/s (initial velocity), $a = -\frac{5}{2}$ m/s$^2$ (acceleration), and $s$ is the displacement.

$$s = \frac{u^2}{2a} = \frac{4^2}{2 \cdot \frac{5}{2}} = \frac{16}{5} m$$

$$W = 10 \cdot 5 = 50 J$$

Solving for $s$, we get:

$$W = F \cdot s$$

Introduction In the realm of physics, the concept of work is fundamental and is used to describe the transfer of energy from one object to another. Work is said to be done when a force applied to an object results in the displacement of the object in the direction of the force. In this study, we will delve into the concept of work, its types, and related problems, as per DC Pandey's Physics Class 11, Part 1. Definition of Work Work done by a force on an object is defined as the product of the force applied and the displacement of the object in the direction of the force. Mathematically, it is represented as:

Using the formula $W = F \cdot s$, we get:

First, we need to find the displacement of the object. Using the equation of motion, we get:

An object of mass 2 kg is moving with a velocity of 4 m/s. A force of 5 N is applied in the opposite direction of motion, causing it to slow down. Calculate the work done by the force.