3.3 w// = or w// = m g w sin Ɵ sin Ɵ w// = (25)(9.8)sin 22o w// = 91.78N (4) 3.4 tan = tan = 0.5 (3) = 26.57 o 3.5 fs(max) = or fs(max) = mgcos w┴ fs(max) = (0.5 ) (25) (9.8) Cos 26.57 o (4) fs(max) = 109.56N [16] QUESTION 4/VRAAG 4 4.1 When a net force is applied to an object of mass m, it accelerates in the direction of the force. The acceleration is directly proportional to the magnitude of the force and is inversely proportional to the mass of the object. / Indien netto krag uitgeoefen word op liggaam met massa ‘n ‘n m, sal die voorwerp versnel in die rigting van die krag. Die versnelling is direk eweredig aan die grootte van die krag en omgekeerd eweredig aan die massa van die voorwerp. (2) 2 kg block/blok 4 kg block/blok 4.2 T T (4) w w 4.3 Consider the mass m1, the 2 kg-block/Beskou massa m1, die 2 kg blok: Fnet = ma T w = m1a – T (2)(9.8) = (2)a – T 19.6 = – 2a ………………. (1) Consider the mass m2, the 4 kg-block/ Beskou massa m2, die 4 kg blok: w -T = m1a (5) (4)(9.8) - T = (4)a 39,2 - T = 4a ………………..(2)
3.3 w// = w sin Ɵ or w// = m g sin Ɵ w// = (25)(9.8)sin 22o w// = 91.78N (4) 3.4 tan = tan = 0.5 = 26.57 o (3) 3.5 fs(max) = w┴ or fs(max) = mgcos fs(max) = (0.5 ) (25) (9.8) Cos 26.57 o fs(max) = 109.56N (4) [16] QUESTION 4/VRAAG 4 4.1 When a net force is applied to an object of mass m, it accelerates in the direction of the force. The acceleration is directly proportional to the magnitude of the force and is inversely proportional to the mass of the object. / Indien ‘n netto krag uitgeoefen word op ‘n liggaam met massa m, sal die voorwerp versnel in die rigting van die krag. Die versnelling is direk eweredig aan die grootte van die krag en omgekeerd eweredig aan die massa van die voorwerp. 2 kg block/blok 4 kg block/blok (2) 4.2 T w T w (4) 4.3 Consider the mass m1, the 2 kg-block/Beskou massa m1, die 2 kg blok: Fnet = ma T – w = m1a T – (2)(9.8) = (2)a T – 19.6 = 2a ………………. (1) Consider the mass m2, the 4 kg-block/ Beskou massa m2, die 4 kg blok: w -T = m1a (4)(9.8) - T = (4)a 39,2 - T = 4a ………………..(2) (5)
PHYSICAL%20SCIENCES%20P1%20GRADE%2011%20MEMO%20ENGLISH%20AN%20AFRIKAANSNOVEMBER%202017.docx