A linear spring has a spring constant of 21.2N/m. What force is required to increase it's length by 1.20cm?

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2