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Please help!!!

Analyzing Forces
Using Free-Body Diagrams
1. Imagine two books sitting at rest
on top of each other on a table.
The top book has a mass of 2 kg,
the book under the top book has a
mass of 3 kg, and the table has a mass
of 20 kg. Clearly there is a force of
gravity (weight) on all three objects.
In addition, because some of the
objects are in contact with other
objects, there may be forces by one
object on another object.
a) Draw a free-body diagram for each
object. On each diagram, draw
arrows representing the force of
gravity and any other forces on the
object by another object (including
the floor).
b) What is the acceleration of each
of the objects?
c) What is the force of gravity
on each object?
d) What is the force on each object by
the other objects?

2 Answers

1 vote

To analyze the forces, draw separate free-body diagrams for each object. The acceleration of each object is zero. The force of gravity on each object can be calculated using the formula F = mg.

To analyze the forces acting on each object, we need to draw a free-body diagram for each of them. For the top book with a mass of 2 kg, the only forces acting on it are the force of gravity and the contact force from the book under it. For the book under the top book with a mass of 3 kg, the forces acting on it are the force of gravity and the contact force from the top book.

The acceleration of each object can be calculated using Newton's second law. Since the objects are at rest on the table, the net force on each object is zero. Therefore, the acceleration of each object is zero.

The force of gravity on each object can be calculated using the formula F = mg, where F is the force of gravity, m is the mass, and g is the acceleration due to gravity (approximately 9.8 m/s^2). For the top book, the force of gravity is 2 kg * 9.8 m/s^2 = 19.6 N. For the book under the top book, the force of gravity is 3 kg * 9.8 m/s^2 = 29.4 N.

Since the objects are at rest, the force on each object by the other objects must be equal and opposite to the contact force between them. Therefore, the force on the top book by the book under it is 19.6 N, and the force on the book under the top book by the top book is also 19.6 N.

User BrinkDaDrink
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4.8k points
2 votes

Answer:

Step-by-step explanation:

mass of top book = 2kg

mass of book under = 3kg

mass of table = 20kg

a) The diagram is in the attached file to this solution

b) Since the objects are at rest, the acceleration of each of the object is zero

c) Force of gravity giving that g = 10 is

for the top book = 2*10 = 20N

for the book under = 3*10 = 30N

for the table = 25*10 = 250N

d) for the top book = 2*10 - 2*10= 0N

for the book under = 3*10 - 3*10 = 0N

for the table = 25*10 - 25*10 = 0N

Please help!!! Analyzing Forces Using Free-Body Diagrams 1. Imagine two books sitting-example-1
User Moisoni Ioan
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5.1k points