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

تمرين 53

(a) Which of the following represents the greatest speed: (1) 1 m/s, (2) 1 km/h, (3) 1 ft/s (4) 1 mi/h (b) Express the speed 15.0 m/s in mi/h.