Physics5 min read
How to Calculate Acceleration From Speed and Time
Acceleration is change in velocity divided by time. Going from 5 to 25 m/s in 4 s gives 5 m/s², and braking shows up as a negative value.
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22 articles
- Physics5 min read
Buoyant Force: Archimedes' Principle With Numbers
A fully submerged 0.02 m³ object in water feels an upthrust of 1000 × 9.81 × 0.02 = 196.2 N. Check whether it floats using weight versus buoyant force.
- Physics5 min read
Force Formula F = ma: Units, Net Force and Examples
F = m × a: a 12 kg mass accelerating at 3 m/s² needs a net force of 36 N. Learn the units, the net-force idea and how to rearrange for mass or acceleration.
- Physics5 min read
Free Fall Distance: How Far an Object Drops in t Seconds
An object dropped from rest falls 44.145 m in 3 s because d = ½ × 9.81 × t². Learn the formula, the drop-time table and when air resistance spoils it.
- Physics4 min read
Gear Ratio Explained: Teeth, Speed and Torque
Gear ratio = driven teeth ÷ driving teeth. A 60-tooth gear driven by a 20-tooth gear is 3:1, cutting speed to a third and raising torque about three times.
- Physics5 min read
Horsepower From Torque and RPM: The Formula
Power in kW = torque (N·m) × rpm ÷ 9,549. A 200 N·m engine at 3,000 rpm makes 62.83 kW, which is about 84 mechanical horsepower.
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