I don't get it at all :( I am taking Foundations of Science three and the question is:
What is the acceleration of a car that, while moving in a straight line, increases its spped from zero to 100 km/hr in 10s?
What? Can someone please explain why it has to have two units of time in a really simple basic way?
2007-09-20 11:06:07 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Velocity is the rate at which displacement is changing.
So its units are length / time.
Acceleration is the rate at which velocity is changing.
So its units are speed / time = length / time^2
2007-09-20 11:15:53 · answer #1 · answered by Dr D 7 · 1⤊ 2⤋
Unit Of Time
2016-10-30 04:44:41 · answer #2 · answered by ? 4 · 0⤊ 0⤋
The expression "an acceleration of 3 metres per second per second for 7 seconds",(written as 3m/sec^2 for 7 seconds) actually means that the speed of the body increases at a rate of 3 metres per second EVERY second for seven seconds. It doesn`t have two units of time at all, it`s just the units we use to define acceleration. Acceleration is a difficult concept to understand when you first come to study it.
2007-09-20 11:30:14 · answer #3 · answered by Twiggy 7 · 2⤊ 1⤋
Acceleration was coined to describe how fast a mass is moving during one mass displacement in time Which was initially given a certain power to move.
Hence acceleration can be defined as the ratio of a moving force by the quantity of the moving mass.
2007-09-20 11:22:36 · answer #4 · answered by goring 6 · 0⤊ 3⤋
bowl of porridge
2016-10-05 06:40:12 · answer #5 · answered by Eric 1 · 0⤊ 0⤋