Answer:
3a) k = 500 N/m
3b) x = 0.05 m
3c) F = 2.5 N
4a) W = 120 N
4b) W = 5 N
4c) W = 0.2 N
Step-by-step explanation:
3a) Force; F = 10 N.
Extension; x = 20 mm = 0.02 m
Formula for spring constant is;
K = F/x = 10/0.02
k = 500 N/m
3b) Force is now; F = 25 N
Since k = 500 N/m
Then x = F/k = 25/500
x = 0.05 m
3c) extension is now 5 mm = 0.005 m
Thus; F = kx = 500 × 0.005
F = 2.5 N
4a) Formula for weight is;
W = mg.
g = 10 N/kg
m = 12 kg
Thus; W = 12 × 10
W = 120 N
4b) Mass; m = 500 g = 0.5 kg
Thus; W = 0.5 × 10
W = 5 N
4c) mass; m = 20 g = 0.02 kg
W = 0.02 × 10
W = 0.2 N