Two blocks are connected by a very light string passing over a massless and frictionless pulley . traveling at constant speed, the 20.0 n block moves 75.0 cm to the right and the 12.0 n block moves 75.0 cm downward. (a) how much work is done on the 12.0 n block by (i) gravity and (ii) the tension in the string?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?