A spaceship ferrying workers to Moon Base I takes a straight-line path from the earth to the moon, a distance of 384000km Suppose it accelerates at an acceleration 20m/s? for the first time interval 15min of the trip, then travels at constant speed until the last time interval 15min, when it accelerates at 20m/s?, just coming to rest as it reaches the moon. a) What is the maximum speed attained? b) What fraction of the total distance is traveled at constant speed? c) What total time is required for the trip?

3. A high speed train is moving at 550 km/h [E]. If it takes 2.00 minutes for the train to come to a stop, what was the train's acceleration during that time? a) 11,000[E] km c) 16500 [W] h² b) 11,000km [W] km d) 16500k[E]

10) An advertisement for the newest model of a Mercedes sports claims the car can go from 0 to 60 miles per hour (mph) in just 3.3 seconds! a) How many meters per second (m/s) is 60 mph? b) In m/s² (sometimes written as m/s/s also, just so you know), what is the supposed acceleration of the sports car?

1. Cars A and B approached each other on a straight road from points 450 m apart. Car A has an initial velocity of 70 kph and decelerates at the rate of 0.4 m/s". Car B has an initial velocity of 20 kph and accelerates at the rate of 0.3 m/s. After how many seconds will the two cars meet?  2. An elevator starting from rest at the first floor of a tall building accelerates uniformly at 0.5 m/s? for 4 seconds, then move at a constant speed for 10 seconds, then decelerate uniformly for 6 seconds until it stopped. If the floors are 3 m apart, at what floor did it stop?