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AP Physics 1: Motion FormulasFor the next few weeks we will be using the first 3 formulas on your Formula Chart. Write down the first 3 formulas below. When ever you see that little zero at the bottom of a variable, for example vx0, that means initially. So vx0 is read the initially velocity in the x-direction. Using your formulas answer the questions below1. A car is driving initially driving at 20 m/s. He then accelerates at 3 m/s2 for a total of 7 seconds. How fast is the car now driving? (Answer: 41 m/s)2. A runner is initially at rest. They sound the horn to begin running and the person runs with an average acceleration of 5 m/s2 for a total of 4 seconds. How fast is the person running? (Answer: 20 m/s)If you doubled the person’s acceleration, how would that effect his end velocity?3. A car was initially moving with a velocity of 12 m/s then they hit their brakes and decelerated at 3 m/s2 for 2 seconds. How much distance was covered in those 2 seconds? (Answer:18 m)4. Now let’s get you into the mood for solving for variables. Using the formulas for position, solve for acceleration. Sometimes the formula you need to use won’t be solved for the variables you need them to be. You’ll first need to solve for the correct variable then substitute in the values to get the answer. 5. A ball was rolled at an initial velocity of 3 m/s. It rolled for 4 seconds and reached a velocity of 11 m/s. What was the average acceleration of the ball throughout the 4 seconds? (Answer: 2 m/s2)If the time rolled had been doubled, how would that effect the average acceleration of the ball?6. A ball, initially at rest, rolls down a ramp. It experiences an acceleration of 5 m/s2. If it is rolls a distance of 2.5 m, how fast is it traveling? (Answer:5 m/s)If the acceleration had been quadrupled, how would that effect the average final speed of the ball?7. A racecar is traveling at 100 m/s. The racecar has just finished the race and needs to come to a stop. Its brakes can decelerate the car at a rate of 4 m/s2. How much time will it take for the car to come to a complete stop? (Answer: 25 seconds)8. A truck undergoes an acceleration of 3.45 m/s2 for 12.0 s. It then travels at a constant speed. How many kilometers has it traveled after 45.0 s? (Hint: Will take 3 functions to get the correct answer. And remember he is only traveling at a constant velocity for 33 seconds.) ................
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