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Find the center of mass of the given system of point masses.
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- (13) find the correct value.00:31:4 Y vs X plot (x,,Y;) (3,0) X Question 2/ 10 Depending on the following figure,where (x1, y1) = (7, 5), the relation that describe Y as a function of X is: 1. Y = 3.75 X- 1.25 2. Y = 1.25 X + 3.75 3. Y = 3,75 X + 1.25 4. ÖY = 1.25 X - 3.75Ex. 4) Solve the equation d ih dt \b(t) а(t) b(t) wo Wi cos wt W1 coS wt -wo
- 518۹ من ٥۱۹۰ Example 2; find O between A¯and B? A*=2î +3ƒ +k , B =3î -2j +k Example 3; if 0=30o between A¯and B'find q value? A¯=2î +2j +4k , B'=qî +j -2k Example 4; Find the angle between the vectors A¯=2î +3ƒ +1k , B` =-4î +2ƒ -1k منو يعرف يحل ذني الاسئله مالت الفيزياء de between4md 8 agnitude 2 and vect he angle a between 90, or 180. following situations must be. On each sit an one correct answ C , (c) A 8-6 B=30 betweenA"an d the angle between t N--4i +2 -1 دعاء صاحب حسین 4:19p äclul 21.02.04 II5. The following graph is of the function A sin Br. %3D 2 4 -2 (a) What is the amplitude of the above sine wave? (b) What is the period of the above sine wave? OMESolve for |v(3)|.
- (e) In situation (3), give the direction of a by naming either a quadrant or a direction along an axis. (This can be done with a few mental calculations.) 7 N 46N 2 N 2 N 5N 2N 1N V1N (1) (2) 6 N 3 N 2N 3 N 5 N 5 N SN 4N 5N (3) (4) O +y axis O x > 0, y > 0 О +хаxis O x > 0, y 0(c) In situation (1), give the direction of by naming either a quadrant or a direction along an axis. (This can be done with a few mentał calculations.) 46N 2 N 3N 2N 5 N 2NV 74N 1N (1) (2) 6N 3 N 5 N 3 N 4 N 5 N 3N 4 N. 4 N 5N (3) (4) O +y axis O x> 0, y > 0 O +x axis O x> 0, y 0Question 5: (a) From Lesotho Bank tower an object was observed on the ground at a depression o below the horizon. A gun was fired at an elevation a, but the shot missing the object, stuck the ground at a point whose depression was y. Prove that the correct elevation è of the gun is given by sin y (1+ cos(20)) sin o (1+ cos(2w)) sin(20 +0) + sin(o) sin(2a+0) + sin(o) 2
- (3) The Moon is approximately 400,000 km from the Earth. An atom of a certain element has adiameter of 4 X 10-8 cm. Given 1 km = 1,000 m and 1 m = 100 cm, about how many atoms ofthis element can be lined up between Earth and Moon?(A) Draw the following directions vectors in a cubic unit cell. (a) [oī] (b) [Z10] (c) [112] (d) (o01] (e) [o01] (B) Draw the following planes in a cubic unit cell. () (3 2 4) (g) (210) (i) (6 3 4) (h) (1 1 1) () (3 4 12)3) Prove that (x)