latihan dan nota fizik tingkatan 4 bab 2 spm

fizik awesome

1. 2.6 FORCE
2.7 IMPULSE AND
IMPULSIVE FORCE
2.7 WEIGHT

3. FORCE

4. •Move or stop an object
•Accelerate or decelerate an object
•Change direction of an object
•Change the shape of an object

5. FORCE
PUSH OR PULL THAT
CHANGES THE OBJECT’s
MOTION
NEWTON’S SECOND
LAW OF MOTION
THE RATE OF CHANGE OF
MOMENTUM IS DIRECTLY
PROPORTIONAL TO THE FORCE
THAT ACTS IN THE DIRECTION
OF APPLIED FORCE
f = ma
SI Unit : N
SI unit: F = ma → kg ms
-2 → N (Newton)

6. object accelerates
object accelerates more
Directly proportional
object moves slowly
inversely proportional

9. a = 8/2 = 4 ms
-2
a = 14 – 6 = 1.6 ms
-2
5
a = (18 – 2) = 1.6 ms
-2
10
a = (10 – 5 – 5) = 0
12

10. a = F/m = 30/5 = 6 ms
-2

11. (a) F = 0 sebab halaju malar
Daya yang menarik = daya geseran = 5 N
(b) F = 17 – 5 = 12 N
a = F/2 = 12/2 = 6 ms
-2

12. (a) s = 2500 m u = 40 v = 0 a = ?
V
2 = u
2 + 2as
0 = (40)
2 + 2(a)(2500)
5000a = - 1600
a = - 0.32 ms
-2 (nyahpecutan)
(b) F = ma = 2000(-0.32)
= - 640 N

13. a = F/m = (120 – 80)/80 = 1.25

16. F = ma = T – 900 = (1000)(2)
T = 2000 + 900 = 2900 N

18. a = F/m = (10 – 2)/4 = 2