What is tangential acceleration and its magnitude 12. if a projectile that was launched from the ground with an initial velocity 100 m/s in the direction 30° north of east collides a rocket that was fired due east 4s after the projectile reached its highest point, how high up was the rocket fired and with what velocity given that the rocket has a constant velocity and was fired when the projectile was over head? 13. a car has a constant acceleration of 0.300 m/s2 and a horizontal velocity of 8.00 m/s at the moment the care is at the top of the rise of the roadway that is shaped like a circle of radius 500 m. what is the magnitude and direction of the total acceleration vector for the car at this instant?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.

Which situation will produce the greatest change of momentum