Assignment:
1. One lightyear is defined to be the distance light can travel in one year.
. What is this distance in meters?
. How long does it take for light get to the Moon?
2. Multiply 1.783 *102 * 4.4 *10-3, taking into account significant figures.
3. What is the surface area of a sephere of diameter 2.4 * 102 cm?
4. What is larger 4000 L or 4 * 105 cm3 (and you must show your reasoning.)
5. A car travels 120 meters in one direction in 20 secons. Then the car returns ¾ of the way back in 10 second.
. Calculate the average speed of the car for the first part of the trip.
. Find the average velocity of the car.
6. A sports car moving at constant speed travels 150 m in 4.00 s. If it then brakes and comes too a stop while decelerating at a rate of 6.0 m/s2 how long does it take to stop?
7. Explain a possible situation where you start with a positive velocity that decreases to a negative increasing velocity while there is a constant negative acceleration.
8. A stone is dropped from the roof of a high building. A second stone is dropped 1.25 s later. How long does it take for the stones to be 25.0 meters apart?