Web Quest Speed and Acceleration

1) Instantaneous Speed - the speed at any given instant in time.

• Average Speed - the average of all instantaneous speeds; found simply by a distance/time ratio.

When you are looking at a speedometer on you vehicle it is instantaneous velocity.

2) d=v*t

d=10m/s*30s

d=300m

3)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.

m/s/s
mi/hr/s
km/hr/s
m/s²

 ^{after 4m the car will be going 28m/s/s}

^{Part 2}

¹⁾Whatever characteristics the velocity has, the slope will exhibit the same (and vice versa).

If the slope of the position time graph inceases the velocity will increase as well.

 2) The slope equation says that the slope of a line is found by determining the amount of rise of the line between any two points divided by the amount of run of the line between the same two points. In other words,

• Pick two points on the line and determine their coordinates.
• Determine the difference in y-coordinates of these two points (rise).
• Determine the difference in x-coordinates for these two points (run).
• Divide the difference in y-coordinates by the difference in x-coordinates (rise/run or slope).    

 ³⁾the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object.If it is in the negitive section or positive section.

a, d, h are the answers to the check your understanding.

Part 3

1) A free falling object is an object that is falling under the sole influence of gravity.

All free-falling objects (on Earth) accelerate downwards at a rate of 9.8 m/s/s (often approximated as 10 m/s/s)

2) The acceleration of the object is an increasing acceleration and theacceleration for the object on mars is 3.75 m/s/s.