Print Tutorial Click Screen for Next Step Return to Main Menu Solving Kinematic Problems Using Equation III d = v i t + ½ at 2 Section 1.

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Presentation transcript:

Print Tutorial Click Screen for Next Step Return to Main Menu Solving Kinematic Problems Using Equation III d = v i t + ½ at 2 Section 1

Print Tutorial Click Screen for Next Step Return to Main Menu A car is traveling at 30.0 m/s and can accelerate at a rate of 5.5 m/s 2. How far does the car travel in 8.0 sec?

Print Tutorial Click Screen for Next Step Return to Main Menu List the variables and their values. v i = 30.0 m/s a = 5.5 m/s 2 t = 8.0 sec d = ?

Print Tutorial Click Screen for Next Step Return to Main Menu Use equation III d = v i t + ½ at 2 v f is not mentioned in the problem.

Print Tutorial Click Screen for Next Step Return to Main Menu Substitute the known values. d=(30.0m/s)(8.0sec)+ (1/2)(5.5m/s 2 )(sec) Solve for the unknown variable. d = 416 m

Print Tutorial Click Screen for Next Step Return to Main Menu Section 2 What is the initial velocity of an electric car that accelerates at 1.4 m/s 2 for 8.0 sec. The distance traveled is m. a) 19.4 m/s b) 23.6 m/s c) m/s d) m/s

Print Tutorial Click Screen for Next Step Return to Main Menu List the variables and their values. a = 1.4 m/s 2 t = 8.0 sec d = 400 m v i = ?

Print Tutorial Click Screen for Next Step Return to Main Menu Use equation III d = v i t + ½ at 2

Print Tutorial Click Screen for Next Step Return to Main Menu Substitute the known values. 400m= v i (8.0sec) + (1/2)(1.4m/s 2 )(8.0sec) 2

Print Tutorial Click Screen for Next Step Return to Main Menu Solve for the unknown variable. If you chose b), try again. If you chose c), try again. If you chose d), try again. If you chose a), you are correct. v i = 19.4 m/s

Print Tutorial Click Screen for Next Step Return to Main Menu Section 3 Now you will solve problems by yourself and see if you get the correct answer.

Print Tutorial Click Screen for Next Step Return to Main Menu A vehicle travels m while accelerating. The vehicle starts from rest and moves for 30.0 sec. What is the vehicle’s acceleration?

Print Tutorial Click Screen for Next Step Return to Main Menu Answer is a = 1.78 m/s 2

Print Tutorial Click Screen for Next Step Return to Main Menu A car starts from rest and accelerates at 5.0 m/s 2 for m. How long did it take to cover this distance?

Print Tutorial Click Screen for Next Step Return to Main Menu The answer is t = sec