A2100 kg car starts from rest and accelerates at a rate of 2.6m/s^2 for 4.0s. assume that the force acting to accelerate the car is acting in the same direction as its motion. how much work has the car done?

A5 nc point charge is at the origin and a second 3 nc point charge is on the x-axis at x = 0.8 m. find the magnitude and direction of the electric field on the x-axs at x = 0.2 m. you may express the direction by letting positive field mean the positive x direction

What determines the amount of inertia an object has

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?