Aparticle travels in a straight line with speed v. the particle slows down and changes direction. the new speed of the particle is v\2 the new velocity has a component of v\4 in the same direction as the initial path of the particle. through which angle has the particle turned? a 27° b 30° c 45° d 60°

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?