Acceleration Acceleration Change in VELOCITY Need an equation

Acceleration

Acceleration �Change in VELOCITY!!! �Need an equation Review y=mx+b x x=vt+xi Slope = velocity xi t What is slope? Shows a Rate of Change Magnitude or Direction If slope is a rate of change, then what type of graph do I need to make an equation for acceleration?

Acceleration � v Slope = accelaration vi y=mx+b v = at + vi t

Acceleration and Units = m/s s What do the units mean? 5 mi/hr : For every hour of travel you move 5 miles. 12 (km/hr) / s : For every second of travel your speed changes by 12 km/hr. Units always have a story to tell and that is why they are so importan

Acceleration and Units So if my speed increases by constant increments of 15 m/s each second, how does that affect the distance I travel? 15 m/s 2 The distance between points is NOT! constant. We travel greater distances because of our increasing speed. v=15 m/s v=0 m/s v=30 m/s v=45 m/s v=60 m/s

Rank from least to greatest acceleration

Practice Jimmy, after digging himself out of a sealed well, saw Jane standing down the road. His racecar can accelerate at a rate of 7 m/s 2. Once Jimmy gets to a speed of 52 m/s Jane will not be able to escape. How much reaction time does Jane have? a = (vf-vi)/t 7 = (52 -0)/t t = 52/7 t = 7. 43 s

Using tables to find acceleration What is the position of the first object for the 8 th second?

Vectors Magnitude and Direction +, - # + Displacement In front of start place Velocity Moving Forward Acceleration v+ a- - • If v+, then speeding up • If v-, then slowing down = Slowing down va- Behind of start place Moving Backward • If v+, then slowing down • If v-, then speeding up = Speeding up