Acar makes a trip due north for three-fourths of the time and due south one-fourth of the time. the average northward velocity has a magnitude of 35 m/s, and the average southward velocity has a magnitude of 41 m/s. taking northward to be the positive direction, what is the average velocity for the trip?

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =