College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 82

A car on a circular track accelerates from rest. (a) The car experiences (1) only angular acceleration, (2) only centripetal acceleration, (3) both angular and centripetal accelerations. Why (b) If the radius of the track is 0.30 km and the magnitude of the constant angular acceleration is 4.5 × 10 3 rad/s 2 , how long does the car take to make one lap around the track (c) What is the total (vector) acceleration of the car when it has completed half of a lap