Given that a runner can run and maintain a constant speed of 5 m/sec, he will cover 5 meters every second. A. how far he travels in 10 sec? B. how far will he run in 1 min? C. how long will it take to finish a 5 kilometer distance?

1. Consider the following v-t graph. a. At what time(s) is the object moving fastest? What is its speed at that time(s)? b. c. Draw a matching d-t graph. d. How far did the object move during the first 5 seconds? e. How far did the object move during the first 10 seconds? √(5) O 0 IT N + 6 4 1 T 00 O IN 2 IT -lot *LD O • [] 4 20 t(o)

1. Treat the motion of a particle which moves along the s-axis as shown. + s, ft or m 1 3 The velocity of a particle is given by v = 20t² – 120t + 25, where v is in meters per second and t is in seconds. a. Plot the velocity versus time graph for the first 10 seconds. Show the zero acceleration. b. Referring to Situation A, what is the velocity of the particle when the acceleration becomes zero. c. Plot the acceleration versus time graph for the first 10 seconds. d. Describe the slope of the velocity and discuss its relationship to the acceleration of the particle.

A swimmer bounces almost straight up from a diving board and falls vertically feet first into a pool. She starts with a speed of 3.4 m/s and her takeoff point is 1.9 m above the pool's surface. a. For how long are her feet in the air , in seconds? here is my ans. 0.34? b. What is the height above the board, in meters, of her highest point? c. What is her velocity , in meters per second, when her feet hit the water? assume the vertical component is positive upwards.