Which phrase best describes when kinetic friotion occurs? A. When balanced forces are acting on an object B. When two surfaces are in contact but not moving relative to each other C. When two surfaces are moving relative to each other D. When one object is resting on another​

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.