1. IP Coasting due west on your bicycle at 7.7 m/s , you encounter a sandy patch of road 7.7 m across. When you leave the sandy patch your speed has been reduced by 2.0 m/s to 5.7 m/s .
a. Assuming the sand causes a constant acceleration, what was the bicycle's acceleration in the sandy patch? Give the magnitude
b. How long did it take to cross the sandy patch? Express your answer using two significant figures.
2. A model rocket rises with constant acceleration to a height of 3.0 m, at which point its speed is 28.0 m/s .
a. How much time does it take for the rocket to reach this height? Express your answer using two significant figures.
b. What was the magnitude of the rocket's acceleration? Express your answer using two significant figures.
c. Find the height of the rocket 0.20 s after launch. Express your answer using two significant figures.
d. Find the speed of the rocket 0.20 s after launch. Express your answer using two significant figures.
3. A volcano launches a lava bomb straight upward with an initial speed of 25 m/s .
a. Taking upward to be the positive direction, find the velocity of the lava bomb 3.0 seconds after it is launched. Express your answer using two significant figures.