A0.6 m diameter solid disk with mass 4.2 kg is rotating with a constant angular velocity of 8t rad/sec. a) what is the tangential speed of a point 15. on the rim? b) calculate the rotational kinetic energy of the wheel. rolling along a find the total kinetic energy of the wheel in the previous problem if the wheel is now horizontal surface at 16 m/s. 16.

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.