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Physics
Study for da test
Question | Answer |
---|---|
What is "Universal gravitation" associated with: | Isaac Newton |
Two objects, one with a mass of m and one with a mass of 4m are attracted to each other by a gravitational farce. If the force on 4m is F, what is the force on mass m in terms of F? | F |
An apple hangs on a tree on the Earth. Which of the following statements is correct? | The forces on the apple and Earth are equal. |
An abject with a mass of 48 kg measured on Earth is taken to the Moon. What is the mass of the object on the Moon's surface if the acceleration due to gravity on the Moon is one-sixth of that on the Earth. | 48 kg |
A rocket moves away from the surface of the Earth. As the distance r from the center of the planet increases, what happens to the force of gravity on the rocket. | The force decreases inversely proportional to 1/r2 |
A spacecraft starts on Earth is moving to Mars. Which of the following is correct about the gravitational force on the spacecraft due to Earth's attraction. | The spacecraft is never beyond the Earth's gravitational attraction |
A spacecraft is orbiting Earth with an orbital radius r. Which of the following is true about the astronauts apparent weight. | The apparent weight is zero because the astronaut is in a free fall |