Gravitational force between everyday objects

Click For Summary
Gravitational force exists between all objects, but it is extremely weak compared to other forces, which is why everyday objects do not visibly attract each other. For instance, the gravitational pull of the Earth, which is 9.8 m/s², is still easily overcome by other forces, allowing people to jump and walk without resistance. Cavendish's experiment successfully measured gravitational attraction using highly sensitive instruments to detect the minuscule forces at play. Even on a nearly frictionless surface, the gravitational force between two large objects is insufficient to overcome static friction, preventing them from moving towards each other. This explains why common items, like coffee mugs, do not slide together in everyday scenarios.
quantizedzeus
Messages
24
Reaction score
0
Gravitational force between everyday objects...

I know It's a common question...but i could not find satisfactory answer...the question is "if every objects are attracting each others then why don't we see the daily objects attracting each others...?? Then how could Cavendish make his experiment...??...
 
Physics news on Phys.org


The gravitational force is extremely weak. As such, other forces usually completely overwhelm the gravitational force between everyday objects.

Just think, you have the entire Earth pulling down on you, and yet it is still relatively easy to jump and walk around.

Cavendish used extremely sensitive measurements to do his experiments.

See: http://en.wikipedia.org/wiki/Cavendish_experiment
 


Like Matterwave said, the force of gravity is extremely weak for objects with masses near ourselves and everyday objects. If they entire mass of the Earth only pulls us down at 9.8 m/s^2, an object a few billion times less massive or more wouldn't be noticeable at all.
 


even on a near frictionless surface like ice, two 1000 kg wouldn't make it to each other because the force of static friction is more then gravity can overcome. Thats why you don't see two coffee mugs sliding towards each other in your kitchen
 
Last edited:


Oh...thanks everyone..this is what i wanted to know ...
 
Thread 'What is the pressure of trapped air inside this tube?'

Thread 'What is the pressure of trapped air inside this tube?'

As you can see from the picture, i have an uneven U-shaped tube, sealed at the short end. I fill the tube with water and i seal it. So the short side is filled with water and the long side ends up containg water and trapped air. Now the tube is sealed on both sides and i turn it in such a way that the traped air moves at the short side. Are my claims about pressure in senarios A & B correct? What is the pressure for all points in senario C? (My question is basically coming from watching...
View full post »

Similar threads

Undergrad Is this analogy between Magnetic Force and Gravitational Force accurate in helping to understand what contributes more to a stronger magnetic force?
  • · Replies 11 ·
Replies
11
Views
2K
High School How many electrons to make a stable gravitational object?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Gravity inside an exponential mass disk
  • · Replies 16 ·
Replies
16
Views
2K
High School Hi, I'm learning physics -- Why do things near me not fall toward me?
  • · Replies 12 ·
Replies
12
Views
1K
Undergrad Understanding Physical Processes: EM, Gravitational, Mechanical & Entropic
  • · Replies 1 ·
Replies
1
Views
1K
High School Potential energy and lifting an object vertically
  • · Replies 29 ·
Replies
29
Views
4K
Undergrad How do forces change with speed?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate The gravitational constant measured by the smallest object
  • · Replies 21 ·
Replies
21
Views
2K
Undergrad Can a Gravitational 'Gun' Accelerate Objects?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Cavendish balance and mass of objects
  • · Replies 6 ·
Replies
6
Views
1K