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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Suppose you have a 120-kg wooden crate resting on a wood floor. (a) What maximum force can you exert horizontally on the crate without moving it? (b) If you continue to exert this force once the crate starts to slip, what will the magnitude of its acceleration then be?

To determine

(a)

The maximum force in horizontal direction that can be applied on the crate without moving it

Explanation

Given info:

Mass of the crate, m=120kg

Formula used:

The magnitude of the friction force is directly proportional to the normal force

  f=μN

The weight of the crate is calculated as

  W=mg

Calculation:

The weight of the crate is calculated as

  W=mg

Here,

  g is the acceleration due to gravity

Plugging the values in the above equation

  W=120×9.81=1177.2N

The weight of the crate will be equal to the normal force

  N=W=1177

To determine

(b)

The magnitude of the acceleration of the crate once it start moving

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