Is work done when you lift a brick? a. no, the force applied is parallel to the direction of motion. b. yes, the force applied is parallel to the direction of motion. c. no, the force applied is perpendicular to the direction of motion. d. yes, the force applied is perpendicular to the direction of motion.

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?