Question

6 and 7?

7 9 10 11 12 13 14 15 16 19 21 14 points QUESTION 6 A place kicker kicks a football with a speed of 20.0 m/s at an angle of 40.0° upward from the horizontal. What is the speed of the ball after it has traveled a horizontal distance of 30.0 m? 2.15.8 m/s b. 17.9 m/s C 19.1 m/s d. 16.6 m/s 14 points QUESTION 7 Starting from rest, a solid cyinder rolls without slipping down an incline dropping a vertical distance of 25.0 cm. What is the speed of the cylinder at the bottom of the incline? 2.19 m/s 6.2.32 m/s C204 d. 1.1 m/s Save Alwers Save and Click Save and submit to wow and submit. Click Save All Auto save all DU DD 391 8 SO F7 FB FA esc F5

Answer 1

Problem No:-6 Football motion is a projectile motion Concept:- Vx a (2000/s) you 0=40° A x Horizontal composent of intial velocity Un = UCOSO Vertical component of intial velocity say = Usino. Horizontal distance travelled by using x=ext + fant? (anzo) x= U eosoxt ta 2 acoso time of flight * Final velocity along x-anis Vyu= u coso Final velocity along y-anis Vy = uy-gt Vy= usino-gt

Vnet = √ z Vanit vyj Magnitude ve ✓ um + vy? ۹۰) solution for given given Problem Given ng=:30 ... ! 20m/s O = 40° time taken to travel 823oom i ༽ t = ucoso 30 20x COS 40, 1. 1.958 S t. 1.965 ( Rounding to hear value) t = ta Final -- Va horizontal velo ocity at x 230 min Ves = cos8 = Qo.co$400. 15.32 m/s Final vertical velocity at a=son is asino-gxt vy= Vy = 12.855 – 19.208 .353 m/s try vy= 20 sinuo -(9.8 x 1.96) !! Vy -6;

1 Final velocity in vector form V = Vnit vyi vz 15-32; -16.353j Magnitude of net velocity of net velocity et 2230 min - lvl = (15.32)² + (6.3532 (VIE 275.063 IV1 = 16:585 m). lvl = 16.6 m/s - option @ is corr is correct: Uzoi Problem wo:-7 0 Vz? P.Ez kiE+ «k. E rotational b- 25 (virus 그 w r ra R2 mg h= 2 mv²t & Tw? mgha 20+ k l m n mgha mo [lt 2 ghzi? [it I MR 1 MR2

ves agh (14 Php?) agh I 1 + MR 2 For soled cylinder OR MR? I va agh It MR? MR? 29h V2 [+ - 49h V? 3 Given h=25cm = 25x10 2 :. speed at bottom of the incline V. V 4x9-8x 25x102 37 326.66mo", 19.storets 18.07x661 1.807 option 6 is correct mis 그 V z