10/9 HS physics class and homework due 10/18

Hi folks,

So today we dove a bit deeper into some of the tougher math of acceleration.  We also did a lab where we found the acceleration of a toy car as it traveled about 25 feet.   Next week we will do more with this data so please keep your data handy from this week

For homework this week 2 assignments.

It sounds like we could use some more practice with some of these acceleration problems so please do the following in this email.

Also, do the Think and Explain questions on page 27 of your text.  Remember for the questions concerning gravity that gravity has a constant acceleration of 10m/s/s.

Answers will follow this email. 

Imagine that you have a ramp that is 10 feet long

1. If the ball rolled down the ramp in 5 seconds, what is the average speed of the ball on that ramp?

2.  What is the acceleration of the ball on this ramp?

3.  As the ball is traveling down the ramp, where does it reach the average speed?

4.  What speed will the ball have at the bottom of the ramp?

5.  Imagine that the ramp was longer and the ball continued to maintain a constant acceleration.  What would the ball's speed be after one second, two seconds, three seconds, four seconds, 10 seconds, 100 seconds?

6.  How long would the ramp have to be for the ball to continue traveling on it for 4 seconds.  How about 8 seconds?

7.  How long would the ramp have to be if you wanted the ball to roll off at exactly  18 ft/s.  (This is one where you need to solve one problem before you solve for the other.)

8.  How long would the ramp have to be if you wanted the ball to roll off at exactly 32 ft/s.  (This is one where you need to solve one problem before you solve for the other.)