A 10-m plank with a mass of 80 kg is being moved by rolling it ...

[joe]

A 10-m plank with a mass of 80 kg is being moved by rolling it over two cylindrical logs, each with a mass of 10 kg and a radius of 20 cm, placed 2 m from either end of the plank.
 
  As the plank is pushed, the logs roll on the ground without slipping, and the plank does not slip on the rollers. A force of 250 N is applied to the plank. What is the speed of the plank after it has moved 2 m, starting from rest? A) 1.87 m/s
  B) 2.53 m/s
  C) 3.43 m/s
  D) 3.54 m/s
  E) 2.37 m/s

Question 2

The power rating of a resistor is 0.800 W. The value of the resistor is 400 . (a) What is the maximum voltage? (b) What is the maximum current it can draw?
 
  What will be an ideal response?

[ntsoane kedibone]

Answer to Question 1

C

Answer to Question 2

(a) 17.9 V
(b) 45 mA

[joe]

Thanks

[ntsoane kedibone]

Welcome