Kinematics And other goodies

Do now: Which two graphs represent the same motion?

Example 2

A car is traveling at 30 m/s for 10 seconds. How far does he travel? d = v * t d = 30m/s * 10s d = 300 m What if, however, the car is accelerating while it is traveling? How then, can we find how far it traveled?

Motion: How can we describe your motion? To use these equations we will need to have constant acceleration! Which we will in regents physics…yay!

A car is at rest at a stop light A car is at rest at a stop light. When the light turns green the car accelerates uniformly at 2 m/s2 for 10 seconds. How far does he travel in those 10 seconds? Given Useful formulas: Vf = vi + at d = vit + (1/2) at2 Vf2 = vi2 + 2ad At rest means vi = 0 m/s a = +10 m/s2 t = 10 s d = ?

A car initially moving at 25 m/s sees a stoplight and instantly presses on the breaks. The car begins to slow down uniformly at a rate of 5m/s2. How far does the car travel before it comes to a full stop?

A car initially moving at 30 m/s sees a wall125m away, the driver takes a second to press on the breaks. Upon hitting the breaks, the car begins to slow down uniformly at a rate of 5m/s2. Does the car hit the wall?

Free fall and the power of gravity