A spring is hanging from a support. The distance that the spring stretches is directly proportional to the mass attached to it. A mass of 35 g stretches the spring 10 cm. How far will a mass of 42 g stretch the spring?
A.
Option 1:
B.
Option 2: 12 cm
C.
Option 3: 14 cm
D.
Option 4:
2007-06-12 12:31:12 · 6 answers · asked by smile 1 in Science & Mathematics ➔ Mathematics
12
2007-06-12 12:43:44 · answer #1 · answered by UNIQUE 3 · 0⤊ 0⤋
I get B by using cross multiplication 35/10 = 42/x then 35x = 420 then x =12
2007-06-12 12:35:51 · answer #2 · answered by SleepyPlant 3 · 0⤊ 1⤋
direct proportion is constant ratio, so
mass/stretch = constant
35/10 = 42/x
7/2 = 42/x
1/2 = 6/x
x = 12 cm.
2007-06-12 12:36:31 · answer #3 · answered by Philo 7 · 1⤊ 1⤋
42x = 35(10)
42 x = 350
x = 8.3
2007-06-12 12:34:28 · answer #4 · answered by Anya 3 · 0⤊ 1⤋
DO YOUR OWN HOMEWORK!!!!
That's what we had to do.
2007-06-12 12:38:59 · answer #5 · answered by grumpyfiend 5 · 0⤊ 1⤋
cmon...you can do that.
2007-06-12 12:37:22 · answer #6 · answered by Anonymous · 0⤊ 1⤋