If a car accelerates at a uniform 4.0 m/s2, how long will it take ...

[CQXA]

If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr, starting from rest?
 
  What will be an ideal response?

Question 2

Water, of density 1000 kg/m3, is flowing in a drainage channel of rectangular cross-section. The width of the channel is 15 m, the depth of the water is 8.0 m and the speed of the flow is 2.5 m/s. At what rate is water flowing in this channel?
 
  A) 2.0  105 kg/s
  B) 2.0  103 kg/s
  C) 3.0  105 kg/s
  D) 3.0  103 kg/s
  E) 3.0  102 kg/s

[smrtceo]

Answer to Question 1

5.6 s

Answer to Question 2

C

[CQXA]

Thanks for the timely response, appreciate it

[alvinum]

Wow, this really help