A jet plane flying at 100 m/s is uniformly accelerated to a cruising speed of 150 m/s in 20 minutes. What is its acceleration during this time? 3. A car traveling at 15 km per hour starts to decelerate steadily. It comes to a complete stop in 15 seconds. What is the car's acceleration?

1. Consider a car that initially travels in the positive direction at a speed of 30 m/s. The car uniformly speeds up to 40 m/s in a time of 5 s. Find the following: a. The acceleration of the car. b. The distance traveled over the entire 5.0 seconds. C. The distance traveled during the 2 s interval where the clock goes from t = 2 s, to t= 4 s. (Assume the 5 s time interval begins with the time = 0s.)

13. A boy walks 155 m at a speed of 3.5 m/s and then runs for 100 m at 8.2 m/s along a straight line. Calculate his average velocity. 14.A boat can accelerate from 2 to 21 km/h in 10 s. How far has the boat travelled in this time?

A stone is thrown straight up from the edge of a roof, 650650 feet above the ground, at a speed of 1616 feet per second.A. Remembering that the acceleration due to gravity is −32ft/sec2−32ft/sec2, how high is the stone 55 seconds later?B. At what time does the stone hit the ground?C. What is the velocity of the stone when it hits the ground?

2. A car initially moving at 20 m/s slows down to a speed of 5 m/s in 5 s. What is its acceleration? How long will take the car to come to a stop?

1. What constant acceleration is required to increase the speed of a car from 20 mi/h to 45 mi/h in 5 s?  2. A car braked with a constant deceleration of 40 ft/sec2, producing skid marks measuring 65 ft before coming to a stop. How fast was the car traveling when the brakes were first applied? Round to the nearest hundredth. Please answer both questions and round both answers to the nearest hundredth.