1) 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 80.0 cm to the right and the 12.0-N block moves 80.0 cm downward.
Find the total work done on 12.0-N block.
Find the total work done on 20.0-N block.
2) A car is stopped at a traffic light. It then travels along a straight road so that its distance from the light is given by x(t)=bt^2?ct^3, where b = 2.60 m/s2 and c = 0.130 m/s3 .
Calculate the instantaneous velocity of the car at t = 5.00 s.
How long after starting from rest is the car again at rest?