A 50 g truck traveling with a speed of 50 h hits a post and is brought to rest in 0.1 s. The average force on the truck is? (Hint: Principle of Impulse and Momentum) A. 508 KN B. -608 kN C. -708 KNOld-fashioned clocks and watches have an hour hand, a minute hand and a second hand. What is the angular velocity of the second hand? rad A. 120n S It rad B. 60 S n rad C. 30 STwo steel balls of masses 500 kg and 50 kg, respectively, are placed with their centers 0.5 m apart. The two balls attract with a force of A. 6.67 x 10 10 N B. 6.67 x 10-7 N C. 6.67 x 10-6