Page 41 - Physics Form 5 KSSM_Neat

Example 1 CHAPTER 1

(a) A spring with original length 50 mm extends by 6 mm when stretched by LET’S ANSWER
LET’S ANSWER
a force of 12 N. Calculate the spring constant of the spring. Force and Motion II
(b) Figure 1.42 shows three arrangements of springs consisting of springs
identical to the one mentioned in (a). For each arrangement, determine:
(i) the tension in each spring
KEMENTERIAN PENDIDIKAN MALAYSIA
(ii) the extension of each spring
(iii) the total extension of the system of springs http://bit.ly/
2FEgv09
(iv) the total length of the arrangement of springs

P T U V

R S
Q W

12 N 12 N 12 N
Arrangement A Arrangement B Arrangement C

Figure 1.42

Solution

(a)
Step 1: Step 2: Step 3: Step 4:
Identify the Identify the Identify the formula Solve the problem
problem information given that can be used numerically

 F = kx
 Spring constant, k k = F
x

 Force, F = 12 N  k = 12
6
Extension of spring, x = 6 mm = 2 N mm –1

LS 1.4.4 31