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Physics · Everyday science · 5 minute read

Why Does a Boat Move Backward When You Jump Forward?

A simple jump from a boat reveals one of Physics' most useful ideas: every force is accompanied by an equal force in the opposite direction.

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Illustrated explanation of Newton's third law using a person jumping from a boat

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Formula sheets

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Mathematics Essential FormulasA compact reference for common Mathematics ideas used across school learning.View Formula Sheet
Percentages
Percentage = part ÷ whole × 100
Ratio and proportion
a : b = a/b
Algebra
(a + b)² = a² + 2ab + b²
Area and perimeter
Rectangle: A = l × b, P = 2(l + b)
Volume
Cuboid: V = l × b × h
Exponents
aᵐ × aⁿ = aᵐ⁺ⁿ
Physics Formula SheetEssential relationships for motion, forces, energy and pressure.View Formula Sheet
Speed
Speed = distance ÷ time
Velocity
Velocity = displacement ÷ time
Acceleration
a = (v − u) ÷ t
Force
F = ma
Work
W = force × displacement
Power
P = work ÷ time
Density
Density = mass ÷ volume
Pressure
Pressure = force ÷ area

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DIKSHA

Curriculum-based digital learning resources from India's national school education platform.

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CK-12 Foundation

Interactive Mathematics and Science resources with digital lessons, practice and simulations.

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PhET Interactive Simulations

Explore Physics and Mathematics concepts through interactive simulations and virtual experiments.

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OER Commons

A collection of open educational resources, activities and learning materials from educators around the world.

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OpenStax

Open educational books and learning resources for students who want to explore Mathematics and Science in greater depth.

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Beyond the Classroom

MIT OpenCourseWare

Advanced Mathematics and Science learning resources for students interested in exploring concepts beyond the school curriculum.

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