Position vs. Time 10 -2 -6 -8 -10 0 02 04 06 08 1 12 14 16 18 2 Time (s) 1. Sket
ID: 1573999 • Letter: P
Question
Position vs. Time 10 -2 -6 -8 -10 0 02 04 06 08 1 12 14 16 18 2 Time (s) 1. Sketch the velocity versus time graph from the above position versus time graph Time Given the above velocity-versus-time graph, sketch the position-versus-time graph. Answer the following questions for projectile motion on level ground assuming negligible air resistance, with the initial angle being neither 0 nor 90 (a) Is the velocity ever zero? (b) When is the velocity a minimum? A maximum? (c) Can the velocity ever be the same as the initial velocity at a time other than at t = 07(d) Can the speed ever be the same as the initial speed at a time other than at t = 0? Can centripetal acceleration change the speed of a particle undergoing circular motion? Why or Why not? 2. 3. 4.Explanation / Answer
answering parts of question 3:
a) If the initial angle is 90, which implies that body is thrown vertically up, the body will attain 0 velocity at the maximum height.
b) The body will have minimum velocity just before it reaches the maximum height.
c) The body will have a maximum height at the time when it's thrown or just before it touches the ground.
d) Yes, just before it travels back to the same point from where it was thrown, the body will have the same velocity as initial velocity. ( only there will be a difference of sign,+ for going up, - for falling back)
e) When the angle is 0 degree, and there is no external force acting on the body, it will continue to travel with same speed.
Q: 4 No, centripetal acceleration arises due to change in velocity when a body is undergoing circular motion, although the speed is constant. Speed deals with the only magnitude