I think that's because while it goes down the Car gains certain momentum and a pull due to gravity which makes its SPEED magnitude increase....
Final velocity minus starting velocity, divided by time it took. Ex. Speeding up you car from 40mph to 60 mph when going on to freeway. It took 2 seconds. 60mph - 20mph= 40mph/2sec =20mph 20mph is your acceleration.
To accelerate when your speed does not increase, you can apply a force in the direction you want to move. This force will cause an acceleration as described by Newton's second law, F = ma. The acceleration will increase your speed over time until a new equilibrium is reached.
A vector. This is because the quantity given has a magnitude (20mph) and a direction (North). It is also an example of a velocity.
Yes in a form. It can not be literaly -20mph but in deceleration it is. when you slow down a car to a stop that is negative volocity. and volacity is speed+direction. ex: 30mph east. so if your travaling 20mph west then slow to a stop it changes to -20mph west. (until you start going east) but because volacity is a messure of speed then yes it is possible. but not like when approching the speed of light when time slows down, if you go slower than it by so much then it speeds up. (because the speed cant be that form and has to be in directiog)
Velocity is a vector quantity that refers to the rate at which an object changes its position. It includes both the speed of the object and the direction of its motion. It is measured in units of distance per unit of time.
No, I hit someone with a car at 20mph, but they where up a hill, and he just fell to the ground and crawled away, i really dont think there was much if any damage done... he hit my car with a baseball bat that is why I hit him if people are wondering...
no, closer to 40 feet (20mphx20 (squared mph)/20 +20mph)
20mph
It depends on the reaction time of the driver. This could be affected by his reaction speed or whether he is intoxicated. In any case the faster he is travelling the longer the thinking distance will be.
20mph
20mph
32.18688kmph