Thursday

August 28, 2014

August 28, 2014

Posted by **Emma** on Sunday, August 26, 2007 at 10:38pm.

1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration?

3m/s^2 / 4 = .75 m/s

2. If an automobile travels at 30 km/hr. for 2 hours, how far does it go?

d=(30 km/hr)(2 hr)= 60 km

3. At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds. During these two seconds, how far does it go? (This one I dont understand)

4. An automobile is traveling at 30 km/hr. It accelerates at 3 m/s2 until it has covered 100 meters.. What is its new velocity? (This one I dont understand)

- Science -
**manny**, Sunday, August 26, 2007 at 11:12pm1. Multiply like in number two

2. Right

3. final velocity^2 = initialvelocity^2 + 2*acceleration*(distance traveled)

-- Solve for distance traveled

4. use above equation and solve for final velocity

**Related Questions**

Physics - Could you please check my answers and units. Thanxs! 1. An automobile ...

Physics - Could you please check my answers and units.Also, help me with 3 and 4...

Physics - A tortoise and hare start from rest and have a race. As the race ...

physics with 6 questions - Two cars start from rest at a red stop light. When ...

Physics - Two cars start from rest at a red stop light. When the light turns ...

Physics - Two cars start from rest at a red stop light. When the light turns ...

physics please help! - A car driving along a straight road increases its ...

physics - If a car starts from rest and accelerates at 6.0 m/sec2 for 6.0 ...

Physics - Can someone please check my answers for the first three questions and ...

physics - Two cars start from rest at a red stop light. When the light turns ...