AP Physics 1: 2.3 Object Interaction and Forces
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Ah, the age old question: how long do I have to wait to stuff my face? Grab a snack and give this question a shot.
AP Physics 1 | Object Interaction and Forces |
Language | English Language |
Science Practice 6 | Working with scientific explanations and theories |
Transcript
you rocks lunch right Your tree house has a sweet
system for bringing up food without making you decent Your
ladder A string connects two baskets over a massless pulley
basket Arrests at ground level and basket b is at
your front patio Yes You have a patio It's that
sweet when your mom comes by and puts lunch in
the lower basket you at rocks to basket be in
orderto lift basket a heavier basket falls and lighter taste
Your basket rises while our lunch is served We'll assume
that the police frictionless that basket a has a massive
two kilograms and basket b has a total mass of
six kilograms How fast as basket egg and your lunch
accelerate and hear the potential answers How many meters per
second squared Whoa This sounds like it might just be
the tree house of our dreams But before we hire
movers let's think about what's going on in his police
system Gravity is pulling down word on each basket and
the tension on the ropes is pulling upward and the
acceleration upward for basket a is the same as the
acceleration downward for basket b force diagrams Great tool here
if we were growing up and look a little something
like this yeah pretty cool huh So looking at the
diagram we can see that the net force of basket
a is tension minus mass times gravity and it's also
equal to mass times acceleration Well the net force of
basket b is similar but with basket be The acceleration
is a negative number because the basket is moving away
from us The equation for basket is expressed a positive
number because lunch headed towards us is always that positive
thinking Now we can solve for acceleration You subtract the
first equation from the second and solve for x And
when we do that we find that the correct answer
is b Well pulley systems are everywhere They're used on
ships elevators especially on physics test So learn this Oh 00:02:26.066 --> [endTime] snap