The formula for calculating speed in mph is: speed (mph) = distance (miles) / time (hours). This formula is derived from the basic definition of speed, which is the distance traveled divided by the time it took to travel that distance.
To convert speed from mph to other units, you can use the following conversions: 1 mph = 1.609344 km/h, 1 mph = 0.44704 m/s, 1 mph = 0.869 nmi/h. You can also use online conversion tools or refer to conversion tables for more accurate results.
Yes, speed can be negative in mph. A negative speed indicates that an object is moving in the opposite direction of the positive direction. For example, if a car is traveling at -60 mph, it means that the car is moving in the opposite direction of the positive direction at a speed of 60 mph.
The main difference between speed and velocity is that speed is a scalar quantity while velocity is a vector quantity. This means that speed only has magnitude, while velocity has both magnitude and direction. In other words, speed tells us how fast an object is moving, while velocity tells us not only how fast, but also in what direction the object is moving.
Speed is closely related to other concepts in physics, such as distance, time, acceleration, and displacement. It is also a fundamental quantity in many equations, including the laws of motion and the equations for calculating kinetic and potential energy. Additionally, speed can be used to measure the rate of change of other physical quantities, such as temperature and sound.