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Tanya [424]
3 years ago
15

A mobile phone is pulled northward by a force of 10 n and at the same time pulled southward by another force of 15 n. the result

ant force on the phone is
Physics
1 answer:
makvit [3.9K]3 years ago
6 0
5 Southward would be the correct answer.
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The distance from one compression in a sound wave to the next compression is defined as the __________.
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The image shows a wheel that’s wound up and released. The wheel moves up and down as shown. Identify the position of the wheel w
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The highest point of the wheel is the position of the wheel when its potential energy is greatest.

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2 years ago
A capacitor is constructed of two large, identical, parallel metal plates separated by a small distance d
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3 years ago
A large refrigerator (mass 80kg) sits at rest inside a house. The homeowner wants to move the refrigerator across the room, so s
Liono4ka [1.6K]

Answer:

400 N

Explanation:

By the law of friction,

F=\mu R

F is the maximum frictional force, \mu is the coefficient of friction and R is the reaction on the refrigerator. On a horizontal surface, the reaction is equal to the weight of the refrigerator.

R=mg

F=\mu mg

While not moving, the fricition on the refrigerator is static friction. So, \mu=0.65

F=0.65 \times80\times9.8=509.6 \text{ N}

This is the maximum frictional force and is more than the applied horizontal force of 400 N. Frictional force cannot be more than the applied force, else it would actually pull the refrigerator backwards (a strange thing, if it were to happen). It is equal to the extent of the applied force because the applied force is not enough to overcome the maximum.

Hence the frictional force is 400 N.

PS: Note that we do not use the coefficient of kinetic friction because applied force could not overcome the static friction.

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3 years ago
A physics student uses a spring loaded launcher to fire a 58 gram projectile horizontally. The projectile leaves the launcher at
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the question does not sk what to find

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3 years ago
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