A automobile climbed up a hill at a consistent speed of 30 m/s before descending at a speed of 70 m/s. (a) What was the average speed during the journey, excluding the time to turn around? (b) What was the trip's average acceleration?

(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 8.06 m/s when going down a slope for 1.61 s? (b) How far does the skier travel in this time?

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 car traveled up a hill at a constant speedof 10 m/s  and then re down the hill at  20m /s. If the time to turn around is ignored,(a) What was the average speed for the trip?(b) What was the average acceleration for the trip?

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 race car travels northward on a straight, level track at a constant speed, traveling 0.587 km in 13.1 sec. The return trip over the same track is made in 27.3 sec.(a) What is the average velocity of the car for the FIRST leg of the trip?(b) What is the average velocity of the car for the SECOND leg of the trip?(c) What is the average velocity of the car for the WHOLE trip?

(a) What is the average acceleration of a skier who, starting from rest, reaches a speed of 8.0 m/sec when going down a slope for 5.0 sec?  (b) How far does the skier travel in this time?

 A stone is thrown straight upward with a speed of 20 m/s. It is caught on its way down at a point 5.0 m above where it was thrown. (a) How fast was it going when it was caught? (b) How long did the trip take?