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Review Problems. Dimensional Analysis, Speed, Velocity, Acceleration and Free Fall. Review Outline:. Dimensional Analysis Problems (converting) What is speed? Calculations using speed formula. What is velocity? How is velocity different from speed? What is acceleration?
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Review Problems Dimensional Analysis, Speed, Velocity, Acceleration and Free Fall
Review Outline: • Dimensional Analysis Problems (converting) • What is speed? • Calculations using speed formula. • What is velocity? • How is velocity different from speed? • What is acceleration? • What are three ways an object can accelerate? • Calculations using acceleration formula.
Review Outline cont’ • What is free fall? • Acceleration due to gravity (g) • Finding final velocity for objects in free fall • Finding the distance for objects in free fall • What is air resistance? • What is terminal velocity?
1. A high school athlete runs 100 m in 12.20 seconds. What is her speed in meters per second? What is her speed in miles per hour?
2. A liquid is measured in the lab with a graduated cylinder. Its volume is 75.6 mL. Convert to gallons.
3. A train leaves the station at the 0.0 m marker traveling with a constant speed of 36 m/s. • How many seconds later will the train pass the 1620.0 meter marker? • What is the train’s speed in km/hr?
4. Using the graph, calculate the average speed, in meters per second for each line.
5. An Indy-500 race car’s velocity increases from 4.0 m/s to 36 m/s over a 4.0 second period. What is the car’s average acceleration?
6. • This graph represents a student running a 100 m race. Explain his race in terms of speed and acceleration.
7. If a car with a speed of 2.0 m/s accelerates at a rate of 5.0 m/s2 for 2.5 seconds, what is its final speed?
8. A car traveled with an average speed of 32.5 m/s for 12.8 seconds. How far did the car travel in that time?
9. A rocket traveling at 155 m/s is decelerated at a rate of -31.0 m/s2. How long will it take to stop the rocket?
10. A lemon is dropped from a balcony. It takes 1.6 seconds for the lemon to hit the ground. • How fast was the lemon traveling when it hit the ground? • What is the height of the balcony?
Answers to Review Problems • 8.2 m/s; 18.3 mi/hr • 0.02 L • a) 45 seconds b) 129.6 km/hr • Green = 0.67 m/s blue = 1 m/s red = 1.3 m/s • 8 m/s2 • The student’s speed is constant until 2 seconds. The student then speeds up and then slows down at end of trip. • 14.5 m/s • 416 m • 5 seconds • a) 15.68 m/s b) 12.5 m