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First, consider a book resting on a horizontal table

Part A 

Which object exerts a downward force on the book?

1. the book itself

2. the earth

3. the surface of the table

Part B

The downward force acting on the book is

a contact force

a long-range force

 

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Sadha
SadhaLv10
27 Dec 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Which object is in static equilibrium?
1) a rolling ball that has a net force acting on it
2) a cruising car that has no net force acting on it
3) a book that has no net force acting on it and is sitting on a table
4) a vase that has a net force acting on it and is sitting on a shelf

Two closed loops A and C are close to a long wire carrying a current I (Figure 1) .

A) While I is decreasing, what is the direction of the net force that the wire exerts on loop A?

The wire exerts a downward force on loop A.

The wire exerts an upward force on loop A.

The wire exerts no force on loop A.

B) While I is decreasing, what is the direction of the net force that the wire exerts on loop C?

The wire exerts an upward force on loop C.

The wire exerts a downward force on loop C.

The wire exerts no force on loop C.

1) An object is moving with constant velocity. Which of the following statements is true?
a) A constant force is being applied in the direction of motion.
b) A constant force is being applied in the direction opposite of motion.
c) There are no forces acting on the object.
d) The net force on the object is zero.
e) There is no frictional force acting on the object.


2) You apply the same force to two objects. Object 1 has mass M and object 2 has mass 5M. The acceleration is 
a) ten times that of object 1 b) five times that of object 1
c) the same as that of object 1 d) 1/5 as that of object 1


3) An object of weight W is in free-fall close to the surface of Earth. What is the force that the object exerts on Earth?
a) a force greater than W b) a force less than W
c) a force equal to W d) no force at all


4) A parking crate slides down an inclined ramp at constant velocity. Thus we can deduce that _
a) a frictional force is acting on it
b) a net downward force is acting on it
c) a net upward force is acting on it
d) it is not acted on by appreciable normal force
e) it is not acted on by appreciable gravitational force

5) A person applies a constant force of 20N to a rock of mass 1000kg for a total of 20 seconds. What is the work done by this person if the person does not move at all by this applied force?
a) 1000J b) 2000J c) 20,000J d) 0J e) 400J

6) If the net work done on an object is positive, then the object's kinetic energy.
a) decreases b) remains the same c) increases d) is zero

7) You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down.
a) Work is + on the way up and + on the way down
b) Work is + on the way up and - on the way down
c) Work is - on the way up and + on the way down
d) Work is - on the way up and - on the way down

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