PHYSICS 15A Midterm: PHYS15A Harvard 05 Spring Midterm1 Solutions

A certain spring that obeys Hooke's law is stretched by an external agent. The work done in stretching the spring by 10 cm is 4 J. How much additional work is required to stretch the spring an additional 10 cm?

(a) 2 J 

(b) 4 J

(c) 8 J   

(d) 12 J

(e) 16 J

A certain spring that obeys Hooke's law is stretched by an external agent. The work done in stretching the spring by 10 cm is 4 J. How much additional work is required to stretch the spring an additional 10 cm?

(a) 2 J 

(b) 4 J

(c) 8 J   

(d) 12 J

(e) 16 J

A certain spring that obeys Hooke's law is stretched by an external agent. The work done in stretching the spring by 10 cm is 4 J. How much additional work is required to stretch the spring an additional 10 cm?

(a) 2 J 

(b) 4 J

(c) 8 J   

(d) 12 J

(e) 16 J