Concept explainers
A car traveling at 30.0 mph uniformly accelerates up to 50.0 mph in 20.0 s. What
was its average speed in m/s? [Hint: 1 mph = 0.447 07 m/s.]
The average speed of the car, in
Answer to Problem 22SP
Solution:
Explanation of Solution
Given data:
The initial velocity of the car is
The final velocity of the car is
Time taken,
And,
Formula used:
Write the expression for average speed.
Here,
Explanation:
Recall the expression for average speed.
Substitute
Conclusion:
The average speed of the car is
Want to see more full solutions like this?
Chapter 2 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
- A speeding car is traveling at a constant speed of 39.5 m/s when it passes a police car. The police car accelerates at 9 m/s2. How far will the police car have to travel to reach the same speed as the speeding car? ROUND THE ANSWER TO 1 DECIMAL PLACE. INPUT NUMERICAL VALUE ONLY.arrow_forwardThe Shinkansen (bullet train in Japan) makes a trip from Tokyo Station to Kyoto station in 2.0 hours and 14 min. The distance traveled is 460 km (to two significant figures). Determine the average velocity of the train in meters per second (m/s). [conversions: 1 km = 1000 m, 1 hr = 3600 s, 1 min = 60 sarrow_forwardA dragster starts from rest and travels 0.95 mi in 9.14 s with constant acceleration. What is its velocity, in mi/h, when it crosses the finish line? Express your answer in 2 decimal places, do not include the unit.arrow_forward
- Amel goes for a walk with a speed of 3kph. After 30 minutes of walk, his wife follows him. Walking 3.25 km for the first hour, 3.75 km for the second hour, 4 km for the third hour and so on maintaining a speed of .25 km per hour. How many hours does the wife take to catch up to her husband?arrow_forwardAn airplane travels at 169 mi/h south for 2.00 h and then at 295 mi/h north for 636 miles. What is the average speed for the trip? Express answers in mi/h. estimate to 2 decimalsarrow_forwardYou drive your car from home to school at an average speed of 60 kph East for 1 hr and then continue 80 kph North for 1.5 hrs. 1. What is your average speed for the entire trip?arrow_forward
- A ball rolls off a table. It hits the ground 1.12 seconds later. How high is the table? Answer in meters.arrow_forwardWhen I did p 2.37 I got zero but that is not the correct answer. I need help.arrow_forward1.3. A ball rolls a certain distance at a speed of 5.0 m/s and is then kicked forward so as to travel a further equal distance in the same direction at a speed of 15.0 m/s. Calculate the average velocity.arrow_forward
- In m/s?, what is the acceleration when t = 7.5 sec? Express your answer as an integer, not as a fraction. 20 15 10 10 15 25 t(sec) -5 -10 -15 -20 v(m/sec) 20arrow_forward7.A motorist drives north for 35.0 min at 85.0 km/h and then stops for 15.0 min. He then continues north, traveling 130 km in 2.00 h. What is his total displacement? ( )arrow_forward7. A car is traveling at a speed of 45 mi/h. Is the driver exceeding the speed limit of 75 km/h? (1 mi=1.609km) 500 marrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON