____ 2. On the temperature vs time graph, it takes 5 minutes to reach 0 degrees C.
____ 3. On the temperature vs time graph, the unit of the slope is min/oC
____ 4. Helen uses a force of 200N to push a cart a distance of 20 meters. How much work did she do on the cart?
____ 5. What is the mechanical advantage of a wedge that requires an input force of 3 N to do 9 N of work?
____ 6. A new runway is being constructed at the Hartsfield-Jackson Atlanta International Airport. If the smaller planes travel at an average velocity of 50m/s, and it takes 5 seconds for the planes to get to the end of the runway, what is the minimum length that the runway should be?
The runway should be at least 100 meters long.
The runway should be at least 200 meters long.
The runway should be at least 150 meters long.
The runway should be at least 250 meters long.
____ 7. Which one of Newton’s three laws of motion is being illustrated in the drawing below?
____ 8. Jupiter is the largest planet in our solar system. An asteroid passing by Earth at a determined distance might not be pulled into our atmosphere, but if the same asteroid were passing by Jupiter at the same distance, it might be pulled into Jupiter’s atmosphere. What is the BEST explanation for this?