Sunday
March 26, 2017

Post a New Question

Posted by on .

Could you please check my answers and units. Thanxs!

1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration?
-I got 12 m/s

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?
-I got 12 m/s

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?
- 6030 (not sure about units)

  • Physics - ,

    3. Change 30km/hr to m/s
    30km/hr*1hr/3600sec*1000m/km

    then
    distance=vi*t + 1/2 at^2

  • Physics - ,

    4. You need to work the units. Chang 30km/hr to meters/second. Then work it, keeping the units in the problem until you find out what your answer is, numerically, and the units.

  • Physics - ,

    I am still not understanding. Like for number 3, this is as far as I got 30km/36000000. Then for number 4, would it be similar as to number 3? Also, did I get number 1 correct?

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question