21 Meter per Second = 68.897638 Foot per Second
Conversion Formula
Unit Information
Meter_per_second
A meter per second (m/s) is the SI unit of speed, widely used in physics, engineering, and scientific research. It defines how many meters an object travels in one second, and is commonly used for cars, trains, athletes, and projectiles.
Foot_per_second
A foot per second (ft/s) is a speed unit often used in engineering, ballistics, and some sports to measure short-distance motion.
Conversion Tips
- Remember to check your decimal places for accuracy.
- This conversion is commonly used in international applications.
- Consider the context when choosing precision levels.
- Double-check calculations for critical applications.
Learn More About Speed
Scientific Overview
Speed is the rate of change of distance with respect to time. It is a scalar quantity that measures how fast an object is moving, regardless of direction.
Historical Background
Early speed measurements were relative and qualitative. Galileo made pioneering speed measurements of falling objects. Modern speed measurement uses radar, lasers, and GPS.
Real-World Applications
Transportation
Vehicle speed monitoring ensures road safety and efficiency.
Sports
Athlete speed measurement helps in training and performance analysis.
Astronomy
Celestial object speeds reveal cosmic dynamics and distances.
Meteorology
Wind speed measurements are crucial for weather forecasting.
Interesting Facts
- The speed of light in vacuum is 299,792,458 m/s.
- The fastest land animal is the cheetah at 120 km/h.
- Sound travels at 343 m/s in air at 20°C.
- The Parker Solar Probe reached 692,000 km/h, the fastest man-made object.
Key Formulas
Average Speed
v = d/tInstantaneous Speed
v = dx/dtConversion
1 m/s = 3.6 km/h