# AP Physics 1: 2.1 Object Interaction and Forces

You may not be able to get Einstein-o the Great at your next birthday party, but you can at least figure out his tricks. Let's find out what the magnitude of gravitational force is between two rocks. ...Sounds like a thrilling party, huh? Really regretting your laser tag or ice skating parties right about now, aren't you?

AP Physics 1 | Object Interaction and Forces |

Language | English Language |

Science Practice 2 | Using math appropriately |

### Transcript

entertainment The opening act of einstein owe the great is

to create gravity He pulls out two rocks each weighing

four kilograms and twelve kilograms respectively and places them four

meters apart huh Expressed in terms of g what is

the magnitude of gravitational force between the two rocks and

hear the potential answers Three things i will to answer

this question we need to remember isaac newton's law of

universal gravitation Sir isaac taught the world that the force

of gravity is equal to the gravitational constant times the

product of the masses of the two objects divided by

the square of the distance between the objects Right So

the equation looks a little something like this right here

So now all we're left to do is plug in

the numbers Well the masses of the two objects are

four kilograms and twelve kilograms And when we multiply those

together we get yes Forty eight kilograms The distance between

the objects is four meters So when we square that

we get sixteen meters Last thing to do is divide

forty eight by sixteen which comes out to three making

a three g The correct answer Remember physics might seem

like magic sometimes but we can learn to make sense

of it We don't even have to smoke and door 00:01:35.279 --> [endTime] mirrors Teo