A force of 4.0 N applied to a spring compresses it by 8.0 cm. What is the amount of work done to compress the spring by an additional amount of 5.0 cm?
A) 20 J
B) 0.26 J
C) 0.50 J
D) 2.0 J
E) 50 N/m
Question 2
A block is on a frictionless horizontal table, on earth. This block accelerates at 1.9 m/s2 when a 90 N horizontal force is applied to it. The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s2.
What is the weight of the block on the moon? A) 77 N
B) 67 N
C) 58 N
D) 48 N
E) 39 N
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