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Chapter 6: Q16 CQ (page 220)

Action at a distance, such as is the case for gravity, was once thought to be illogical and therefore untrue. What is the ultimate determinant of the truth in physics, and why was this action ultimately accepted?

Short Answer

Expert verified

The observation of gravity was a great achievement during that time to develop the theories and hence it is ultimately accepted.

Step by step solution

01

Definition of Gravity

Gravity is a universal phenomenon and is introduced by Newton and Derived the expression for gravitational force.

02

Determining the ultimate determinant

From the gravitational force, it was developed the facts about the planet鈥檚 revolution around the orbits.

Using gravitation, almost astronomical problems can be explained and derived to many conclusions.

Therefore, the observation of gravity was a great achievement during that time to develop the theories and hence it is ultimately accepted.

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Most popular questions from this chapter

If you wish to reduce the stress (which is related to centripetal force) on high-speed tires, would you use large- or small-diameter tires? Explain.

Two friends are having a conversation. Anna says a satellite in orbit is in freefall because the satellite keeps falling toward Earth. Tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not9.80 m/s2. Who do you agree with and why?

Newton鈥檚 laws of motion and gravity were among the first to convincingly demonstrate the underlying simplicity and unity in nature. Many other examples have since been discovered, and we now expect to find such underlying order in complex situations. Is there proof that such order will always be found in new explorations?

(a) What is the acceleration due to gravity on the surface of the Moon?

(b) On the surface of Mars? The mass of Mars is \({\bf{6}}.{\bf{418}} \times {\bf{1}}{{\bf{0}}^{{\bf{23}}}}{\bf{kg}}\) and its radius is\({\bf{3}}.{\bf{38}} \times {\bf{1}}{{\bf{0}}^{\bf{6}}}{\bf{m}}\).

A large centrifuge, like the one shown in Figure (a), is used to expose aspiring astronauts to accelerations similar to those experienced in rocket launches and atmospheric re-entries. (a) At what angular velocity is the centripetal acceleration \(10g\) if the rider is \(15.0{\rm{ m}}\) from the centre of rotation? (b) The rider鈥檚 cage hangs on a pivot at the end of the arm, allowing it to swing outward during rotation as shown in Figure (b). At what angle \(\theta \) below the horizontal will the cage hang when the centripetal acceleration is \(10g\)? (Hint: The arm supplies centripetal force and supports the weight of the cage. Draw a free body diagram of the forces to see what the angle \(\theta \) should be.)



*Figure (a) NASA centrifuge used to subject trainees to accelerations similar to those experienced in rocket launches and re-entries. (Credit: NASA) (b) Rider in cage showing how the cage pivots outward during rotation. This allows the total force exerted on the rider by the cage to be along its axis at all times.
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