A sky diver jumps from a "perfectly good" plane. Prior to opening their parachute they fell 625 m in 12.5 s, and after opening their parachute they fell an additional 325 m in 125 s. (a) What is their average velocity prior to opening the parachute? (b) What is their average velocity with the parachute opened? (c) What is the average velocity for the entire motion?

A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/ s, and her takeoff point is 1.80 m above the pool. (a) How long are her feet in the air? (b) What is her highest point above the board? (c) What is her velocity when her feet hit the water?

A jogger accelerates from rest to 3.12 m/s in 3.52 s. A car accelerate from 22.2 to 39.7 m/s also in 3.52 s. (a) Find the magnitude of the acceleration of the jogger. (b) Determine the magnitude of the acceleration of the car. (c) How much futher does the car travel than the jogger during the 3.52 s?

solve the following exercise

A boy runs for 24 seconds.  During the first 8 seconds, his minimum speed is 2.6 m/s, while his maximum speed is 4.8 m/s.  During the remaining time, his minimum speed is 4.8 m/s, while his maximum speed is 5.6 m/s. calculate the maximum (least upper bound) on the distance that he runs, in meters.

An automobile travels on a straight road for 34 km at 36 km/h. It then continues in the same direction for another 34 km at 72 km/h. (a) What is the average velocity of the car during this 68 km trip? (Assume that it moves in the positive × direction.) (b) What is the average speed?

(a) Calculate the height (in m) of a cliff if it takes 2.19 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.06 m/s. (Enter a number.) 5.8 m (b) How long (in s) would it take to reach the ground if it is thrown straight down with the same speed? (Enter a number.)

A person walks 20.0 meters in a straight line. Then the person turns around and walks back 18.0 meters along the same line. The time for the walk is 9.00 seconds.(a) What is the average speed for this walk?(b) What is the average velocity for this walk?(c) What is the displacement?(d) What is the total distance?

A boy runs for 23 seconds.  During the first 10 seconds, his minimum speed is 2.2 m/s, while his maximum speed is 3.1 m/s.  During the remaining time, his minimum speed is 3.1 m/s, while his maximum speed is 4.7 m/s. calculate the maximum (least upper bound) on the distance that he runs, in meters.

A train is slowing down as it travels along a straight, level track. A uniform acceleration of 1.25 m/s² was achieved as the train slowed down so that the final speed of the train is 20 km/h after traveling a distance of 35 m. (a) What was the speed of the train at the beginning of this distance? (b) How long did it take for the train to travel the 35 m? (c) Include a complete