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3 years ago

Please help me please

Physics

1 answer:

uranmaximum [27]3 years ago

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Answer:

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During the deceleration of an ascending elevator, the normal force on the feet of a passenger is _____ her weight. During the de

gizmo_the_mogwai [7]

Answer: Smaller than ; larger than

Explanation:

When the elevator is moving in the upward direction, then the force acting on it is negative in nature because of

N= mg +ma, (g is gravity and a is acceleration)

here ma is negative so the N= mg-ma

Hence, it feels smaller than its original weight.

When the elevator is moving downward , then the force acting will be positive in nature

N= mg+ma,

here ma will be positive so it feels larger the original weight of passenger.

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3 years ago

A bike travels 30m/s for 3 seconds. How far did it travel?

Elena L [17]

He traveled 90 meters

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3 years ago

Many physical properties, such as force and mass, cannot be measured directly. Rather, some other physical property is measured

Salsk061 [2.6K]

Answer:

u =0.269

Explanation:

To find the coefficient of friction we know the following formula

$F_{f} = uN$

Where

$F_{f}$ = Force of Friction

$u$ = Coefficient of Friction

$N$ = Normal Force

Thus we first find the Normal force (N). Remember that the Normal force is perpendicular to the surface, and is equal to the opposing component of Weight (W). Since the surface here is horizontal, then the Normal force will be equal to the Weight.

$N = mg\\ N = (2.12)(9.8)\\ N = 20.776 N$

Now we find the Force on the spring that caused the extension of 3.25cm or 0.0325m

$F_{f} = ke$

Where

$F_{f}$ = Force of Friction

$k$ = Force Constant

= extension

Hence

$F_{f} = ke\\ F_{f} = (172)(0.0325)\\ F_{f} =5.59N$

Now to find the coefficient of friction we use the first formula

$F_{f} = uN\\ 5.59 = u(20.776)\\ u =0.269$

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3 years ago

Which statements are true of all scientific endeavors? Check all that apply.

uranmaximum [27]

All scientific endeavors involve experimentation.

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4 years ago

Magnetism is a ? A) FORCE B) POWER C) FORM OF ENERGY D) FORM OF ELECTRICITY

Ksivusya [100]

I believe this answer is Force

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3 years ago

Read 2 more answers

Please help me please​

Please help me please