Question

.1
The temperature of a string (of length 50cm, area 0.4cm2,and

Y=21011N/m2) is reduced by 10oC. The force needed to bring back the string to its original length ,is

1)
800N

2)
600N

3)
400 N

4)
1000N

Answer 1

Answer:

800N

Explanation:

See the of the