3.13. Hãy tính động năng toàn phần của các vật sau: a. Một đĩa đặc đồng chất khối lượng m 2  kg lăn không trượt trên mặt phẳng nằm
ngang với vận tốc v 4  m/s.
b. Một quả cầu đặc đồng chất khối lượng m 250  g, bán kính R 6cm  lăn không trượt
trên mặt bàn nằm ngang với vận tốc góc   20 rad/s, trong quá trình chuyển động
trục quay của nó có phương không đổi (song phẳng)

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.