(1. Where on the graph above is the object changing direction? (How do you know?) 3. A car moves at 12 this and coasts up a hill with a uniform acceleration of -l .6 mis2 a) What is the displacement after 6 see? b) What is the displacement after 9 sec? c) What is going on? Plot vt graph of this problem to explain. Determine As from the graph. 4. A speedboat starts from rest and accelerates at +2.01 this1 for 100 5. At the end of this time. the boat continues for an additional 6.00 s with an acceleration of +0513 mfsz. Following this, the boat accelerates at - 1.49 rm's2 for 8.00 s. (a) What is the velocity of the boat at r = 21.0 s? (b) Find the total displacement of the boat. This is a 3 segment problem! The end velocity of the rst segment is the start velocity of the second, the end velocity of the second is the start velocity of the third. etc 5. Challenging: Reaction Time Problem - A car is traveling 20 mfs when the driver sees a child standing on the road. She takes 0.8 s to react then steps on the brakes and slows at 10 misi. How far does the car go before it stops? 6. On a planet that has no atmosphere, a rocket 14.2 m tall is resting on its launch pad. Freefall acceleration on the planet is 4.45 mfsz. A ball is dropped from the top of the rocket with zero initial velocity. a) how long does it take to reach the launch pad b} what is the speed of the ball just before it hits the ground? '1". You are a bungee jumping fanatic and want to be the rst bungee jumper on Jupiter. The length of your bungee cord is 45.0 m. Free fall acceleration on Jupiter is 23.1 nv'sz. What is the ratio of your speed on Jupiter to your speed on Earth when you have dropped 45 to? Ignore the effects of air resistance and assume that you start at rest. 3. A stone is thrown vertically upwards with a speed of 20.0 mfs. a) How fast is it moving when it reaches a height of 12.0 tn? b) How long is required to reach this height? c) Why are there 2 answers to b? 9. A stone is thrown vertically upward with a speed of 12.0 mfs from the edge of a cliff T50 rn high as shown at right. a] How much later does it reach the bottom of the cliff? b) What is its speed just before hitting? c) What total distance did it travel