Engineering Mechanics
Engineering Mechanics. Instructor: Professor Manoj K Harbola, Department of Physics, IIT Kanpur. In this course, we would be studying mechanical interaction between different bodies when they interact through the forces applied on each other. Topics covered in this course include Review of Newton's laws of motion and vector algebra; Equilibrium of bodies; Plane trusses; Friction; Properties of plane surfaces; Method of virtual work; Motion of particles; Momentum; Work and energy; Rotational kinematics and dynamics; Simple harmonic oscillator; and Motion in non-inertial frames. (from nptel.ac.in)
| Lecture 51 - Momentum Transfer, Impulse and Force due to a Stream of Particles Hitting ... |
In this lecture we consider a situation where a ball or a marble hits a wall or another hard object. In such cases, the contact time is very short and the corresponding force varies significantly over this time. Therefore in such situations it is more meaningful to talk about net momentum transferred by the ball rather than the force. The net momentum transferred is of course the force integrated over the time that it is applied for. This quantity is defined as the impulse of the force. After defining impulse, we next use it to calculate force generated when a stream of such particles hits a wall continuously. This is illustrated by calculating the pressure of a gas in a container.
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