Topics to know for Test

1

• Topics to know for Test 2 (Ch 4 5)
• Vectors in 1 or 2 dimensions
• Tension in hanging signs, Atwood
• River problem
• Forces on inclines, Friction on incline
• Vectors using law of sines or cosines
• Vectors using sumx and sumy
• Simple Conservation of energy Problem
• 12 muliple choice 4 word problems

2

• 1.What is the net force acting in the x
  dimensionfor the following car?

1,000N 100N -500N
Fengine
Fwind
Ffriction
3

• a.What is the acceleration of the car based on
  the net force if the mass of the vehicle is 150kg?

1,000N 100N -500N
Fengine
Fwind
Ffriction
4

• 2.Solve for the resulting vector from the
  following digram?

400 m/s
30 deg
30 m/s
5

• 3.A boat is traveling east at 100 m/s. A current
  flows south at 20 m/s. The river is 1,000m
  across.

• Find the resulting vector w/ direction
• b) How much time does it take to get across the
  river?
• c) What is the displacement from A to B on the
  eastern shore line?

A
B
6

• 4.A sign is suspended as shown. Calculate the
  tension in each cable!!!

A
O1
O2
B
Theta 1 37 degrees Theta 2 72 degrees
W 1, 000 Newtons
7

• 5.Solve for the net force from the following
  three forces. Hint Sum the forces in x and in y!

A
400N
10 degrees
30 degrees
B
300N
70N
8
6. A 1kg brick slides down an incline plane. If
the brick slides _at_ a constant velocity

• Calculate the Fw
• Calculate the F
• Calculate the Fn
• Calculate the Ffriction

037
9
30
3
3
426.2 m/s
426.2
10
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