' The speed of a 4.0 N hockey puck, stiding across a level ice surface, decreases at the rate of 0.61' m/s2. The coefficient of kinetic friction between the puck and ice is:

How to calculate voltage drop in a series circuit

Aman is trying to drag a small tree that he cut down. if the static coefficient of friction of the tree on the ground is 0.5 and the tree weighs 670 n, what is the minimum amount of horizontal force that the man will need to apply so that the tree will start moving? o a. 465 n o b. 230 n o c. 670 n o d. 335 n

Aforklift raises a box above the floor and does 2,000 j of work. if the forklift motor consumes 3,000 j of electrical energy from the battery to raise the box, what is the efficiency of the lift?