University:
College
Course:
College Physics
Academic year:

2022
Views:

276

Pages:

1
Author:

5CelestialChronicle

Name ___________________________ Chapter 4 Class __________________ Date ____________ Linear Motion Speed, Distance, and Acceleration Calculate the average speed of a jogger who runs 100 meters in 30 seconds. 1. Read and Understand What information are you given? Distance = 100 m Time = 30 s 2. Plan and Solve What are you trying to calculate? Average speed What formula contains the quantities and the unknown? Average speed = total distance covered time interval Replace each variable with its known value. Average speed = 100 m 3.3 m/s 30 s 3. Look Back and Check Is your answer reasonable? Yes, the number calculated is the quotient of distance and time, and the units indicate speed. Math Practice On a separate sheet of paper, solve the following problems. 1. Calculate your average speed if you travel 210 kilometers in 7 hours. average speed = 210 km = 30 km/h 7h 2. If your average speed is 40 kilometers per hour and you have traveled for 0.5 hour, what distance have you traveled? distance = average speed × time = 40 km/h × 0.5 h = 20 km 3. Calculate your acceleration if your change in speed is 20 meters per second and the time interval is 5 seconds. acceleration = change in speed/time interval = 20 m/s = 4 m/s2 5s