ICSE Class 10 Physics — Flashcards

A: Force is a push or pull applied on a body by another body to change its state, size, or shape. It can change the dimensions of the body.

A: This is a change in dimensions. Force can stretch, compress, bend, or deform a body. Example: loading a spiral spring stretches it and changes its length.

A: Contact forces act only when objects are in physical contact, such as frictional force, normal reaction force, tension, spring force, and collision force. Non-contact forces act without physical conta

A: Work is done only when a body is displaced under the influence of an applied force. Formula: W = F·d Also, W = Fs cosθ Meaning: - F = force - d = displacement - θ = angle between force and displacem

A: No work is done because there is no displacement of the wall. Reason: - Force acts - Displacement is zero - So, W = F × 0 = 0 J This is a common zero-work case.

A: The load moves horizontally, while gravity acts vertically downward. Angle between force and displacement = 90° So, W = Fs cos90° = 0 This is zero work due to perpendicular force and displacement.

A: A machine is a device by which a large resistive force called the load can be overcome at some point by applying a small force called the effort at a convenient point and in a desired direction, or by

A: Load is the resistive force overcome by the machine. Effort is the force applied to the machine to overcome the load. In a simple example, the load is the heavy object and the effort is the force used

A: A machine works as a force multiplier when mechanical advantage is greater than 1, so load is greater than effort. In that case, a small effort can lift a larger load.