Gravitational Forces Concept Review Game

Consider an exosolar planet that has the same mass as Earth but one-half the radius. Which planet would exert a greater force of gravity on a spaceship with a mass of 2,000 kg that is 20,000 km from the center of the planet?

• The force of gravity would be the same for both planets.

• The force of gravity would be greater near the exosolar planet.

• The force of gravity would be greater near Earth.

• There is not enough given information to know.

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The Moon is held in its orbit around Earth by the force of gravity. Which of the following statements about the force of gravity on the Moon by Earth is correct?

• The force of gravity points in the direction of the Moon's motion in its orbit.

• The force of gravity points opposite the direction of the Moon's motion in its orbit.

• The force of gravity points toward the center of Earth.

• The force of gravity on the Moon points away from the center of Earth.

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Gravitation

• The area around a magnet or a moving, electrical charge that can exert a magnetic force

• A law describing the electrostatic force of interaction between charged particles based on the strength of the charges and the distance between the particles

• A force of attraction exerted by each particle of matter in the universe on every other particle

• A region around a charged particle or object, within which a force would be exerted on other charged particles or objects

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Scientists have discovered numerous exosolar planets, or planets outside our solar system. Consider a planet that is the same size as Earth but is one-half the mass. How much would a person weigh on this planet compared to the person's weight on Earth?

• The weight on the new planet would be half as much as on Earth.

• The weight on the new planet would be twice as much as on Earth.

• The weight on the new planet would be the same as it is on Earth.

• The weight would be zero, because the planet is in outer space.

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A scientist is attempting to determine the value of G, the gravitational constant, by measuring the force of gravity between two brass spheres. If the scientist doubles the distance between the two spheres, what will happen to the force of gravity the spheres exert on each other?

• The force will decrease by a factor of four.

• The force will decrease by a factor of two.

• The force will increase by a factor of four.

• The force will increase by a factor of two.

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As mass increases, force __________ . As distance increases, force _________.

• increases, increases

• decreases, increases

• increases, decreases

• decreases, decreases

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Which force is the weakest?

• 1.13x10^-6

• 2.46x10^-7

• 2.46x10^-8

• 8.54x10^-9

• As distance increases, force increases

• As distance decreases, force decreases

• As distance increases, force decreases

• There is no relationship between distance and force

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Use the formula to calculate the force of Gravity where the gravitational constant is $6.67x10^{-11}$  $\frac{Nm^2}{kg^2}$   

mass1=35kg    mass2=150kg    distance=3m Please round to the nearest 100th

•  $3.89x10^{-8}$  

•  $3.93x10^6$  

• 583

•  $4.0x10^{-8}$  

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What would happen to the force if mass 2 decreased?

• The force would not change

• The force would decrease

• The force would increase

• Mass 1 would increase, which would keep the force the same

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