Take two vectors that point in the positive and positive directions, such as and . The dot products of the velocity vector with and are
and
We want the angles between these vectors to be 45º, for which we have . So
When , the velocity vector is equal to the zero vector, which technically has no direction/doesn't make an angle with any other vector. So the only time this happens is for
Answer:4. Two charged objects have a repulsive force of 0.080 N. If the distance separating the objects is tripled, then what is the new force? Explanation: The electrostatic force is inversely related to the square of the separation distance.