What is the angular speed of a car wheel of diameter 0.400m when the speed of the car is 108km/h?

A) 75 rad/s      B) 150 rad/s      C) 270 rad/s      D) 540 rad/s       Identify equation as w=v/r      Diameter = 0.4m  Radius  = half the diameter = 0.2m       Velocity needs to be in m/s so 108km/h = 108000m/h = 30m/s (divide by 60 twice).       Angular velocity = v/r = 30/0.2 = 150 therefore B is the answer.

EW
Answered by Edward W. Physics tutor

14870 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

A gold leaf electroscope with a zinc plate top is charged by briefly connecting it to the negative electrode of a high-voltage supply. Explain how the gold leaf will appear and how the leaf can be caused to drop again.


When catching a ball, a cricketer moves his hands for a short distance in the direction of travel of the ball as it makes contact with his hands. Explain why this technique results in less force being exerted on the cricketer's hands


Why is the centripetal force necessary for circular motion?


If a bulb has a current of 20mA and voltage of 5V, and the current cost of electricity is £3 for a kW/hour. How much money would you spend to power the bulb for 8 hours? Are these good estimates for the current, voltage and cost of electricity?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences