A man runs at a constant 4m/s for 40s and then runs @ 8m/s back to his starting position. A. Total time of run ? B. Total distance covered? C. Avg speed D. Displacement at end of trip ? E. Avg. Velocity and direction if any ?

i need help with Only the last 3 parts ( C D and E)

Consider the following examples regarding distance, displacement, speed and velocitya. A track athlete runs a 1600-meter race in 250 seconds. In this race, they start and end atthe same point.i. Total distance traveled by the athlete?ii. Total displacement of the athlete?iii. Average velocity of the athlete for the race?iv. Average speed of the athlete for the race?b. A track athlete runs the 100 meter dash in 10 secondsi. Total distance traveled by the athlete?ii. Total displacement of the athlete?iii. Average velocity of the athlete for the race?iv. Average speed of the athlete for the race?

6. A futsal player leaves the bench and runs 5.0 m [N] and then 4.0 m [W] where she stops after 9 seconds. Gi a. what is the total distance traveled b. what is the displacement of the player c. what is her average speed d. what is her average velocity

An automobile with an initial speed of 20 m/s accelerates at a rate of 5 m/s2. Use one of your kinematic equations and find how fast the car is moving after accelerating for 3 seconds.    a. 15 m/s.   b. 225.5 m/s.   c. 35 m/s.   d. 400 m/s.

Hicham El Guerrouj of Morocco holds the world record in the 1500 m running race. He ran the final 400 m in a time of 51.9 s. What was his average speed in mph over the last 400 m?A. 14.2 mph                      B. 15.5 mphC. 17.2 mph                      D. 23.9 mph

6. A car starts from rest and accelerates at a rate of 1.8 m/s² West for 15s. It goes at a constant velocity for 50s and then accelerates at a rate of 2.1m/s² East for 10 s. Use West as the positive direction. a. Draw an acceleration graph for this situation. Remember to quantitatively label your axes. a (m/812) t(s) 0-15 15-65 65-75 b. What is the change in velocity for each time interval? Av (m/s) t(s) Draw a velocity graph for this situation. Remember to quantitatively label your axes. v (m/s) E t(s) d. What is the total displacement between t-Os and t= 75 s?

A test rocket is fired straight up from rest with a net acceleration of 20 m/s2. After 4 seconds the motor turns off, but the rocket continues to coast upward with no appreciable air resistance. What maximum elevation does the rocket reach? Hint: There are two motions involved here. Upwards with upward directed acceleration 20 m/s2 for 4 s and the rest free fall. A. 487 m B. 327 m C. 320 m D. 408 m E. 160 m

A car accelerates from rest for 6 seconds with a constant acceleration of 1.5 m/s2. Find the final velocity of the car.   a. 9 m/s.   b. 6 m/s.   c. 1.5 m/s   d. 3 m/s.

2. A car is traveling down a long, straight road at 15 m/s (about 25 mph) when the driver sees an obstacle and brakes to a stop at a rate of 10 m/s² (magnitude). A typical driver has a reaction time of 0.5 s, that is it takes them this long after seeing the obstacle before they apply the brakes. 1. What is the minimum stopping distance for the above driver? 2. What would be the minimum stopping distance if the driver is initially traveling at 30 m/s instead of 15 m/s?