A gear with a \( 20^{\circ} \) pressure angle and a pitch circle diameter of 200 mm is situated between two bearings. The gear is driven by a 120 kW power source and rotates at \( 150 \mathrm{r} / \mathrm{min} \). Calculate the following: 6.2.1 The torque transmitted 5.2.2 The tangential force on the gear .2.3 The normal force on the gear 2.4 The radial force on the gear

- Which time function of velocity has a uniform non zero-acceleration at any time \( t \) ? \( \begin{array}{llll}\text { A. } v=9 t^{3} & \text { B. } v=9 t^{2} & \text { C. } v=9 t-4 t^{2} & \text { D. } v=9 t\end{array} \)

6) A 70 kg man steps onto a scale inside an elevator. What does the scale read if the elevator descends while slowing down at a rate of \( 3 \mathrm{~m} / \mathrm{s}^{2} \) ? a. 49 kg b. 70 kg c. 82 kg d. 91 kg

\( vf=vi+a.t \)

1. Если бы можно было уложить в один ряд вплотную друг к другу 10000000 молекул воды \( (\mathrm{d}=0,3 \) нм), то получилась бы ниточка длиной... 1. 3 m . 2. 300 cm . 3. \( 0,003 \mathrm{~m} \). 4. 3 дм.

\( vf=vi+a.t \)