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leva [86]
4 years ago
13

A book is sitting on a table at rest. Which of the following best describes the forces acting on the book?

Physics
2 answers:
padilas [110]4 years ago
7 0

Answer:

D.

The forces on the book are balanced because the gravity pulling down on the book is equal to the upward force applied by the table.

Monica [59]4 years ago
7 0

Answer:

The answer is D

The forces on the book are balanced because the gravity pulling down on the book is equal to the upward force applied by the table.

Explanation:

An object at rest has balanced forces acting upon it, since there is no change in movement. These forces always include gravity (on the Earth), but does not include friction, since the book is not moving. The table holds the book up with an upward force that is opposite gravity.

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4 years ago
You observe a hockey puck of mass 0.12 kg, traveling across the ice at speed 18.3 m/sec. The interaction of the puck and the ice
Galina-37 [17]

The stopping distance is 143.1 m

Explanation:

First of all, we have to find the acceleration of the hockey puck. This can be done by using Newton's second law of motion:

\sum F =ma

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a is the acceleration

Solving for a,

a=\frac{\sum F}{m}=\frac{-0.14}{0.12}=-1.17 m/s^2

The motion of the puck is a uniformly accelerated motion, therefore we can use the following suvat equation:

v^2-u^2=2as

where:

v = 0 is the final velocity (the puck comes to a stop)

u = 18.3 m/s is the initial velocity

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s is the stopping distance

And solving for s, we find

s=\frac{v^2-u^2}{2a}=\frac{0-(18.3)^2}{2(-1.17)}=143.1 m

Learn more about accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

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