# Determining Whether Gravitational or Electromagnetic Forces Dominate Between 2 Objects of Known Charge & Mass

• 1.

Two conducting bodies are located 3 meters apart. The first body has a mass of 2.5 kg and has a charge of {eq}4.2\cdot 10^{-9}\ C {/eq} and the second body has a mass of 3.8 kg, with a charge of {eq}5.1\cdot 10^{-9}\ C {/eq}. Determine which force predominates between them, the gravitational force or the electric force?

• Neither force dominates.

• The two forces dominate.

• Electric Force

• Gravitational Force

• 2.

Determine the predominant force between two large conducting cylinders. The first cylinder has a charge of {eq}7.6\cdot 10^{-9}\ C {/eq} and a mass of 150 kg and the second cylinder has a charge of {eq}9.8\cdot 10^{-9}\ C {/eq} and a mass of 350 kg.

• Electric Force

• Neither force dominates.

• Gravitational Force

• The two forces dominate.

• 3.

To make a study, a physics professor places two charged rings at a distance of 50 cm apart. The first ring has a mass of {eq}5\cdot 10^{-3}\ kg {/eq} and a charge of {eq}6.9\cdot 10^{-9}\ C {/eq} and the second ring has a mass of {eq}4.3\cdot 10^{-3}\ kg {/eq} and a charge of {eq}7.6\cdot 10^{-9}\ C {/eq}. Which force is predominant between the rings?

• Gravitational Force

• Electric Force

• The two forces dominate.

• Neither force dominates.

• 4.

In an experimental room there are two spheres of pure silver, with equal masses and different charges. If the mass of the two spheres is 190 kg and the charges are {eq}15\cdot 10^{-9}\ C {/eq} and {eq}6.3\cdot 10^{-9}\ C {/eq}, identify if the predominant force between them is electric or gravitational.

• The two forces dominate.

• Electric Force

• Gravitational Force

• Neither force dominates.

• 5.

Two silver wires are placed 20 cm apart. The weight of each wire is {eq}100\cdot 10^{-6}\ kg {/eq}, the wire on the right has a charge of {eq}1.3\cdot 10^{-9}\ C {/eq} and the wire on the left is {eq}0.4\cdot 10^{-9}\ C {/eq}. Specify which force predominates between the two wires, the gravitational force or the electric force?

• Neither force dominates.

• Gravitational Force

• The two forces dominate.

• Electric Force

• 6.

Two conductive masses are placed close to each other. The first is a mass 15 kg and the other is a mass 7 kg. They have charges of {eq}9.8\cdot 10^{-9}\ C {/eq} and {eq}7.5\cdot 10^{-9}\ C {/eq} respectively. What will be the predominant force between them?

• The two forces dominate

• Electric Force

• Gravitational Force

• Neither force dominates

• 7.

What will be the dominant force between two copper cubes placed 2 meters apart? The first cube has a mass of 300 kg and a charge of {eq}1.5\cdot 10^{-9}\ C {/eq} and the second cube has a mass of 480 kg and a charge of {eq}1.3\cdot 10^{-9}\ C {/eq}.

• Gravitational Force

• The two forces dominate

• Neither force dominates

• Electric Force

• 8.

Two conductive objects, with a masses of {eq}50\cdot 10^{-3}\ kg {/eq} and {eq}75\cdot 10^{-3}\ kg {/eq} and a charge of

{eq}7.9\cdot 10^{-9}\ C {/eq} and {eq}9.1\cdot 10^{-9}\ C {/eq} respectively, have been placed in a laboratory in a major city. Will the predominant force between the two objects be the electric force or the gravitational force?

• The two forces dominate

• Electric Force

• Gravitational Force

• Neither force dominates

• 9.

A group of scientists, who want to study the predominant forces between two charged objects, have placed two gold rods near one another. The first rod has a charge of {eq}0.5\cdot 10^{-9}\ C {/eq} and a mass of {eq}60\cdot 10^{-3}\ kg {/eq}, while the second rod is charged with {eq}1.9\cdot 10^{-9}\ C {/eq} and has a mass of {eq}75\cdot 10^{-3}\ kg {/eq}. What will be the predominant force found by the scientists?

• Gravitational Force

• The two forces dominate

• Electric Force

• Neither force dominates

• 10.

Determine which force predominates between two point charges of mass {eq}8.4\cdot 10^{-32}\ kg {/eq}, if one of the masses has a charge of {eq}7.4\cdot 10^{-9}\ C {/eq} and the other has a charge of {eq}1.1\cdot 10^{-9}\ C {/eq}.

• Neither force dominates

• The two forces dominate

• Electric Force

• Gravitational Force

• 11.

Two gold wire rings are placed 15 cm apart. The weight of each wire is {eq}3\cdot 10^{-3}\ kg {/eq}. The ring on the right has a charge of {eq}4.3\cdot 10^{-9}\ C {/eq} and the ring on the left has {eq}3.7\cdot 10^{-9}\ C {/eq}. Which force predominates between the two rings, the gravitational force or the electric force?

• The two forces dominate

• Electric Force

• Gravitational Force

• Neither force dominates

• 12.

To conduct a study, a scientist places two small metal plates at a distance of 56 cm. The first plate has a mass of {eq}150\cdot 10^{-3}\ kg {/eq} and a charge of {eq}4.8\cdot 10^{-9}\ C {/eq}, while the second plate has a mass of {eq}120\cdot 10^{-3}\ kg {/eq} and a charge of {eq}9\cdot 10^{-9}\ C {/eq}. Which force is predominant between the plates?

• Neither force dominates

• Gravitational Force

• The two forces dominate

• Electric Force

• 13.

A group of university students, who want to study the predominant forces between two charged objects, have placed two steel bars near one another. The first bar has a charge of {eq}1\cdot 10^{-9}\ C {/eq} and a mass of {eq}90\cdot 10^{-3}\ kg {/eq}, while the second bar is charged with {eq}2.6\cdot 10^{-9}\ C {/eq} and has a mass of {eq}88\cdot 10^{-3}\ kg {/eq}. What will be the predominant force found by the students?

• Neither force dominates

• Gravitational Force

• The two forces dominate

• Electric Force

• 14.

Determine the predominant force between two large conducting tubes. The first tube has a charge of {eq}8\cdot 10^{-9}\ C {/eq} and a mass of 150 kg and the second tube has a charge of {eq}10\cdot 10^{-9}\ C {/eq} and a mass of 290 kg.

• Electric Force

• Neither force dominates

• The two forces dominate

• Gravitational Force

• 15.

What will be the dominant force between two metal spheres placed 4 meters apart? The first sphere has a mass of 1.2 kg and a charge of {eq}5.8\cdot 10^{-9}\ C {/eq} and the second sphere has a mass of 3 kg and a charge of {eq}4.4\cdot 10^{-9}\ C {/eq}.

• The two forces dominate

• Gravitational Force

• Neither force dominates

• Electric Force

• 16.

Determine which force predominates between two charged masses of 176 kg. One of the masses has a charge of {eq}4\cdot 10^{-9}\ C {/eq} and the other mass has a charge of {eq}2.6\cdot 10^{-9}\ C {/eq}.

• Electric Force

• Neither force dominates

• Gravitational Force

• The two forces dominate

• 17.

In an experimental room sit two iron balls with equal masses and different charges. If the mass of the two spheres is 2 kg and the charges are {eq}11\cdot 10^{-9}\ C {/eq} and {eq}7.9\cdot 10^{-9}\ C {/eq}, identify if the predominant force between them is electric or gravitational.

• Electric Force

• Neither force dominates

• Gravitational Force

• The two forces dominate

• 18.

Two conductive objects are side by side. The first is a object of 101 kg and the other is a object of 96 kg, with charges {eq}6\cdot 10^{-9}\ C {/eq} and {eq}7.7\cdot 10^{-9}\ C {/eq} respectively. What will be the predominant force between them?

• Neither force dominates

• Gravitational Force

• Electric Force

• The two forces dominate

• 19.

Two conducting objects are located 1.5 meters apart. The first object has a mass of 75 kg and has a charge of {eq}5\cdot 10^{-9}\ C {/eq} and the second object has a mass of 56 kg, with a charge of {eq}3.6\cdot 10^{-9}\ C {/eq}. Determine which force dominates between them, the gravitational force or the electric force?

• Neither force dominates

• Gravitational Force

• The two forces dominate

• Electric Force

• 20.

Two conductive bodies, with masses of 70 kg and 55 kg and a charges of {eq}3.2\cdot 10^{-9}\ C {/eq} and {eq}5.6\cdot 10^{-9}\ C {/eq} respectively, have been placed in a room. Will the predominant force between the two bodies be the electric force or the gravitational force?

• Gravitational Force

• Electric Force

• The two forces dominate

• Neither force dominates

• 21.

To make a study, a group of scientists places two cubes of steel at a distance of 2 m. The first cube has a mass of 2 kg and a charge of {eq}6\cdot 10^{-9}\ C {/eq}, while the second cube has a mass of 5 kg and a charge of {eq}4.5\cdot 10^{-9}\ C {/eq}. Which force is predominant between the cubes?

• The two forces dominate

• Electric Force

• Gravitational Force

• Neither force dominates

• 22.

A professor, who wants to study the predominant forces between two charged objects, has placed two silver rings near one another. The first ring has a charge of {eq}1.6\cdot 10^{-9}\ C {/eq} and a mass of {eq}7\cdot 10^{-3}\ kg {/eq}, while the second ring is charged with {eq}0.4\cdot 10^{-9}\ C {/eq} and has a mass of {eq}10\cdot 10^{-3}\ kg {/eq}. What will be the predominant force found by the professor?

• Electric Force

• Gravitational Force

• The two forces dominate

• Neither force dominates

• 23.

Determine the predominant force between two copper coins. The first coin has a charge of {eq}14\cdot 10^{-9}\ C {/eq} and a mass of 0.03 kg and the second coin has a charge of {eq}11\cdot 10^{-9}\ C {/eq} and a mass of 0.05 kg.

• Gravitational Force

• Electric Force

• The two forces dominate

• Neither force dominates

• 24.

What will be the dominant force between two steel plates placed 2.5 meters apart? The first plate has a mass of 0.5 kg and a charge of {eq}8\cdot 10^{-9}\ C {/eq} and the second plate has a mass of 0.7 kg and a charge of {eq}13\cdot 10^{-9}\ C {/eq}.

• Electric Force

• Gravitational Force

• The two forces dominate

• Neither force dominates

• 25.

Two conducting iron pieces are located 2 m apart. The first piece has a mass of 55 kg and has a charge of {eq}6\cdot 10^{-9}\ C {/eq} and the second piece has a mass of 80 kg, with a charge of {eq}3.3\cdot 10^{-9}\ C {/eq}. Determine which force predominates between the two pieces, the gravitational force or the electric force?

• Electric Force

• Gravitational Force

• The two forces dominate

• Neither force dominates

• 26.

Two copper rods are placed 0.5 m apart. The weight of each rod is 1 kg. The rod on the right has a charge of {eq}5\cdot 10^{-9}\ C {/eq} and the rod on the left has {eq}5.3\cdot 10^{-9}\ C {/eq}. Which force predominates between the two rods, the gravitational force or the electric force?

• Gravitational Force

• Electric Force

• The two forces dominate

• Neither force dominates

• 27.

Two steel wires, with masses of {eq}800\cdot 10^{-3}\ kg {/eq} and {eq}750\cdot 10^{-3}\ kg {/eq} and charges of {eq}1.5\cdot 10^{-9}\ C {/eq} and {eq}1.9\cdot 10^{-9}\ C {/eq} respectively, are being studied. Will the predominant force between the two wires be the electric force or the gravitational force?

• Neither force dominates

• Electric Force

• Gravitational Force

• The two forces dominate

• 28.

Determine which force predominates between two small steel figures of mass 1.4 kg each, if one of the figures has a charge of {eq}9\cdot 10^{-9}\ C {/eq} and the other figure has a charge of {eq}11\cdot 10^{-9}\ C {/eq}.

• The two forces dominate

• Gravitational Force

• Electric Force

• Neither force dominates

• 29.

In a university classroom a group of students placed two cylinders of stainless steel, with equal masses and different charges, near one another. If the mass of the two cylinders is 3 kg and the charges are {eq}19\cdot 10^{-9}\ C {/eq} and {eq}17\cdot 10^{-9}\ C {/eq}, identify if the predominant force between the two cylinders is electric or gravitational.

• Gravitational Force

• The two forces dominate

• Electric Force

• Neither force dominates

• 30.

Two metal cubes are placed close to each other. The first has mass of 4.6 kg and the other has a mass of 5.4 kg. They have charges of {eq}18\cdot 10^{-9}\ C {/eq} and {eq}14\cdot 10^{-9}\ C {/eq}, respectively. What will be the predominant force between them?

• Neither force dominates

• Gravitational Force

• The two forces dominate

• Electric Force

Support