Exercise 3 • A truck slows down from 40 m/s to 12 m/s during this time the truck covered a distance of 800m. What is the average acceleration of the truck?

• How long did it take the speed to decrease from 40m/s to 12m/s​

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.

Calculate the linear momentum of a pickup truck that has a mass of 1000kg, and is traveling eastward at 20 m/s

18. a 6.7 kg object moves with a velocity of 8 m/s. what's its kinetic energy? a. 26.8 j b. 167.5 j c. 53.6 j d. 214.4 j