Two trucks of equal mass behave like rigid bodies. If a head-on collision between the two trucks is assumed to be perfectly elastic, which option BEST describes the post-collision situation? A) The slower trucks reverses direction but maintains the same speed.
B) The trucks exchange their speeds and reverse their direction of motion.
C) Both trucks start to move in the direction of the truck with higher speed.
D) The faster truck slows down to the speed of the slower truck but continues in the same direction.

What kind of simple machine is a catapult?

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?