Saturday

December 20, 2014

December 20, 2014

Posted by **y912f** on Thursday, February 5, 2009 at 11:18am.

1. A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall.

STRAIGHT DOWN

2. Which is the force of an acceleration?

FORCE

3. A free-body diagram of a ball falling in the presence of air resistance would show

A DOWNWARDS ARROW TO REPRESENT THE FORCE DUE TO GRAVITY AND AN UPWARD ARROW TO REPRESENT THE FORCE OF AIR RESISTANCE

4. As an object falls toward Earth

THE OBJECT EXERTS A DOWNWARD FORCE ON EARTH

5. A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter's acceleration?

0.22 M/S^2

6. A hocky stick hits a puck on the ice. Identify an action-reaction pair in this situation

THE STICK EXERTS A FORCE ON THE PUCK; THE PUCK EXERTS A FORCE ON THE STICK

7. Calculate the following, expressing the answer in scientific notation with the correct number of signifant figures: (8.86 + 1.0 * 10^-3) / 3.610 * 10^-3

i dont really get this one

- Physics -
**bobpursley**, Thursday, February 5, 2009 at 11:28amI dont understand 2.

On 4, forces occur in pairs, the downward force on the object is matched by an upward force on Earth.

7.

when multiplying or dividing the number of significant digits in the answer is equal to the leesor number of significant digits in either of the original numbers.

**Answer this Question**

**Related Questions**

Foreign languages - I left out the following sentences. Thank you. I also need ...

Foreign languages - Can't you have the structure "have someone do something" in ...

Math - A box of chalk and 2 staples cost $10. Three box of chalk and 2 staplers ...

math - chalk contains 3% of carbon,10%of calcium & 12%of oxygen.find the amount ...

math - box of chalk and 2 staplers cost $10.00. Three boxes of chalk and 2 ...

math - A box of chalk and 2 staplers cost $10. Three boxes of chalk and 2 ...

math - A box of chalk and 2 staplers cost $10. Three boxes of chalk and 2 ...

chemistry - You want to measure the CaCo3 contents in chalk. To this end, you ...

geography - which of the following group of rocks can be easily dissolved in ...

Math - Sarah is giving toys to the kids on the playground. She wants to make ...