Soal dan Pembahasan Elastisitas (Fisika Kelas XI)
Elasticity 1. A spring when pulled by a force of 20 N increased length of 6 m. What is the potential energy? A. 1,2 x 10 2 N/m B. 2,33 x 10 2 N/m C. 3,33 × 10 2 N/m D. 4,2 x 10 2 N/m E. 5,22 x 10 2 N/m 2. A bar of steel which is 4 mm 2 in cross-sectional area and 4 cm in length is pulled by a force of 100 N. If the modulus of elasticity of steel is 2 x 10 11 N/m 2 , so the stress and strain of the steel is. . . A. 1,25 x 10 4 N/m 2 and 2,5 x 10 7 B. 1,25 x 10 -4 N/m 2 and 2,5 x 10 5 C. 2,5 x 10 5 N/m 2 and 1,25 x 10 4 D. 2,5 x 10 6 N/m 2 and 1,25 x 10 -4 E. 2,5 x 10 7 N/m 2 and 1,25 x 10 -4 3. A cylinder made of steel has a length of 10 m and diameter 4 cm. What is the length increment of the cylinder if it is given a load of 10 5 N. (E = 2 x 10 11 N/m 2 )? A. 3,89 x 10 -4 m B. 3,98 x 10 -3 m C. 3,89 x 10 3 m D. 3,88 x 10 4 m E. 3,98
