Conceptual Example 20.1 shows that the gravitational force between an electron and a proton is about 10 −40 times weaker than the electric force between them. Since matter consists largely of electrons and protons, why is the gravitational force important at all?
Conceptual Example 20.1 shows that the gravitational force between an electron and a proton is about 10 −40 times weaker than the electric force between them. Since matter consists largely of electrons and protons, why is the gravitational force important at all?
Conceptual Example 20.1 shows that the gravitational force between an electron and a proton is about 10−40 times weaker than the electric force between them. Since matter consists largely of electrons and protons, why is the gravitational force important at all?
Expert Solution & Answer
To determine
To explain: The importance of gravitational force.
Answer to Problem 1FTD
Gravitational force is important because it acts on all the bodies and it binds everything in the whole universe together.
Explanation of Solution
Gravitational force is the weakest of all known forces in nature. The gravitational force is responsible for holding all the bodies. The gravitational force follows the inverse square law, just like the electrostatic force, but the difference in magnitude is very significant. The gravitational force between a proton and electron is
10−40 times weaker than the electric force between them.
The strength of gravity decreases with distance but if the body is massive, it will have a higher magnitude of gravitational force. Gravity is important as it gives the body its weight. It is extends throughout the whole space and all bodies regardless of its size experience the gravitational force.
Conclusion:
Therefore, gravitational force is important because it acts on all the bodies and it binds everything in the whole universe together.
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C01: Physical Quantities, Units and Measurementscobris alinu zotinUD TRO
Bendemeer Secondary School
Secondary Three Express Physics
Chpt 1: Physical Quantities, Unit and Measurements Assignment
Name: Chen ShiMan
loov neowled soria
25
( 03 ) Class: 3 Respect 6 Date: 2025.01.22
1
Which group consists only of scalar quantities?
ABCD
A
acceleration, moment and energy store
distance, temperature and time
length, velocity and current
mass, force and speed
B
D.
B
Which diagram represents the resultant vector of P and Q? lehtele
시
bas siqpeq olarist of beau eldeo qirie-of-qi
P
A
C
-B
qadmis
rle mengaib priwollot erT S
Quilons of qira ono mont aboog
eed indicator
yh from West
eril to Inioqbim srij
enisinoo MA
(6)
08 bas 8A aldao ni nolent or animaleb.gniweb slepe eld
260 km/h
D
1
D.
e
51
The figure gives the acceleration a versus time t for a particle moving along an x axis. The a-axis scale is set by as = 12.0 m/s². At t = -2.0
s, the particle's velocity is 11.0 m/s. What is its velocity at t = 6.0 s?
a (m/s²)
as
-2
0
2
t(s)
4
Two solid cylindrical rods AB and BC are welded together at B and loaded as shown. Knowing that the average normal stress must not
exceed 150 MPa in either rod, determine the smallest allowable values of the diameters d₁ and d2. Take P= 85 kN.
P
125 kN
B
125 kN
C
0.9 m
1.2 m
The smallest allowable value of the diameter d₁ is
The smallest allowable value of the diameter d₂ is
mm.
mm.
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