Chapter 3: Q26P (page 124)
The mass of the Sun is 
The mass of the Earth is 
and their center-to-center distance is 
Suppose that at some instant the Sun's momentum is zero (it's at rest). Ignoring all effects but that of the Earth, what will the Sun's speed be after one day? (Very small changes in the velocity of a star can be detected using the "Doppler" effect, a change in the frequency of the starlight, which has made it possible to identify the presence of planets in orbit around a star.)
Short Answer
The value of force
Step by step solution
Identification of given data
Mass of sun 
Mass of earth 
Distance 
Calculation of the gravitational force
According to the Newton’s low of gravitation
According to the Newton’s low of gravitation
Where
G – Gravitational constant
- Mass of 1 object
Mass of 2 objects
Distance between two object
So after putting the values we get
Thus, the value of force is 
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apart (about one atomic radius). Which interactions between two electrons is stronger, the gravitational attraction or the electric repulsion? If the two electrons are at rest, will they begin to move toward each other or away from each other? Note that since both the gravitational and the electric forces depend on the inverse square distance, this comparison holds true at all distances, not just at a distance of 
.
, and an alpha particle (consisting of two protons and two neutrons)is located at 
. a) Calculate the force the proton exerts on the alpha particle. b) Calculate the force the alpha particle exerts on the proton?
are connected by a low-mass spring (Figure 3.63). This device is thrown through the air with low speed, so air resistance is negligible. The motion is complicated: the balls whirl around each other, and at the same time the system vibrates, with continually changing stretch of the spring. At a particular instant, the
ball has a velocity 
and the
ball has a velocity
. a) At this instant, what is the total momentum of the device? b) What is the net gravitational (vector) force exerted by the earth on the device? c) At a time 
later, what is the total momentum of the device?