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Posted on Jan 02, 2017
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Jan 27, 2014 | Cars & Trucks
Average speed = 23km / 0.17hrs = 135.29km/hr
Average velocity = 4km / 0.17hrs = 23.53km/hr
The average speed is 135.29km/hr but the velocity is only 23.53km/hr. The reason that velocity is lower, is that it can be positive and negative. Remember this from our earlier discussion on velocity? If not,click to refresh your memory. Since the velocity has negative and positive values some will cancel each other out, hence the lower value. Speed, however, can only be positive.
Jul 19, 2011 | Adobe Computers & Internet
When given time (t), acceleration (a) and ending velocity (ve), use the following:
When given time (t), acceleration (a) and distance (d), use the following:
When given distance (d), ending velocity (ve) and acceleration (a), use the following:
Apr 12, 2011 | Computers & Internet
In mechanics, for a body with constant mass, the acceleration of the body is proportional to the net force acting on it.
where F is the resultant force acting on the body, m is the mas of the body, and a is its acceleration.
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.
When an object's velocity changes, it accelerates. Acceleration shows the change in velocity in a unit time. Velocity is measured in meters per second, m/s, so acceleration is measured in (m/s)/s, or m/s2, which can be both positive and negative.
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