Question

four identical charged particles, each with charge q, are fixed in place in the shape of an equilateral pyramid with sides of length l, as shown above. what is the electrical potential energy of this arrangement of charges?

Answer 1

The net impulse delivered by the force is approximately 14 Ns.

The net impulse is defined as the change in momentum of the object. Momentum is the product of mass and velocity.

The change in momentum can be calculated by subtracting the initial momentum from the final momentum.

Since the object starts from rest, the initial momentum is zero. We can calculate the final momentum by using the following equation:

p = mv = 3 kg * 14 m/s = 42 kg*m/s

The net impulse can be calculated as:

J = Δp = p_f - p_i = 42 kg*m/s - 0 kg*m/s = 42 kg*m/s

To convert the momentum from kg*m/s to Ns, we need to divide by the mass of the object.

J = 42 kg*m/s / 3 kg = 14 Ns .