How do you calculate the acceleration of an object moving in a straight line

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

What will a positive and a negative charge do if they are separated from each other?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell