A parallel plate of area 400 cm2 is dragged over a 0.20 cm thick ...

[jrubin]

A parallel plate of area 400 cm2 is dragged over a 0.20 cm thick layer of oil at a speed of 30.0 cm/s. It takes a force 1.20 N applied to the plate to sustain this speed. What is the viscosity of the oil?
 
  A)
 
  6.00 kg/(ms)
  B)
 
  20.0 kg/(ms)
  C)
 
  60.0 kg/(ms)
  D)
 
  0.200 kg/(ms)
  E)
 
  200 kg/(ms)

Question 2

A 1000-kg car is traveling at 20.0 m/s toward the north. During a collision the car receives an impulse of 1.00  104 Ns toward the south. What is the velocity of the car after the impulse is applied to the car?
 
  A)
 
  0.00 m/s
  B)
 
  20.0 m/s north
  C)
 
  30.0 m/s north
  D)
 
  -10.0 m/s south
  E)
 
  10.0 m/s north

[kescobar@64]

Answer to Question 1

D

Answer to Question 2

E