Quiz Chapter 3  Law of Gravitation  Rectangular Components  Law of Inertia and Equilibrium  Position Vectors  Angular Positions

1. Compute the weight of a 180 kg person? a) newtons b) 1766 newtons c) 1800 newtons d) 1766 Newtons

2. Resolve a 500 N force directed at 25.0 degrees to the right horizontal into its rectangular coordinates. a) (453, 211) N b) (211, 453) N c) (500, 25) N d) (25, 500) N

3. Find the resultant of the following vectors:(43.1, –25.5), (23.0, 15.00), (–21.5, 30.5) a) (20.0, 44.6) b) (44.6, 20.0) c) (87.6, 71.0) d) (71.0, 87.6)

4. Which of the following statements is incorrect if an object is in static equilibrium? a) The object has constant linear velocity. b) The resultant force equals zero. c) The object is falling. d) S F = 0

5. Calculate the position vector from A (4.56, 8.33) to B (–5.45, 9.13) cm? a) (10.01, –0.800) cm b) (–0.890, 17.46) cm c) (10.01, 17.46) cm d) (–10.01, 0.800) cm

6. How many radians are in a 110 degree angle? a) b) c) d) 35.0

Correct answers 1)b = mg = x 9.81 = )a = (500 cos 25°, 500 sin 25°) 3)b = ( –21.5, – ) 4)c = falling means it is speeding up 5)d = (–5.45–4.56, 9.13–8.33) 6)a = 110° x (/180°)

Rank yourself  5-6: You took high school math.  3-4: Not too shabby.  0-2: Time to do homework after each class.