Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together.

What is the speed of the trucks after the collision?

A

v/4

B

v/2

C

v

D

5v/4

If an individual is right-handed, under most circumstances it would be safe to assume that their right arm is stronger and more fatigue resistant, since it is probably used to carry out a majority of daily tasks. a. True b. False

Isaac tosses a twig into a river to figure out how quickly the water is flowing. He observes that the twig travels 21 meters south in three seconds. Based on his observations, what is the velocity of the twig?

Explain the changes in molecular motion of particles as they change from solid to liquid to gas.

Which best describes a relationship among the vectors? Vectors P and Py are components of vector Px. Vectors Px and Py are components of vector P.

A - 4.0-µC charge is located 0.45 m to the left of a + 6.0-µC charge. What is the magnitude and direction (to the right or to the left) of the electrostatic force on the positive charge?

The boy moving down the hill posses what energy?

In what ways does a river carry its load?

What is a unit of mass?

Which is not an era of the Phanerozoic eon

Newton's third law states that when an object exerts a force on another object, the second object exerts an equal but opposite force on the first object. Which of the following shows an example of this? a.