13.- 5 points A 20-ton truck collides with a 1500-lb car. Which of the following statements must be true? a) During the collision, the force on the truck is greater than the force on the car. b) During the collision, the force on the truck is equal to the force on the car. c) During the collision, the force on the truck is smaller than the force on the car. d) The truck did not slow down during the collision, but the car did. e) The car did not slow down during the collision, but the truck did.

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

Which of the following is an example of units for speed

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.