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3 years ago

A 20-N force acts on an object with a mass of 2.0kg. what is the objects acceleration?

Physics

2 answers:

Sav [38]3 years ago

8 0

Answer:10m/s^2

Explanation:

Mathematically,

Force =mass ×acceleration

Given force ( F )=20N

Mass ( m )=2.0kg

Acceleration ( a ) =?

Substitute them into the equation

20N =2kg ×a

Making a the subject by dividing through by 2

2kga/2 =20N/2kg

a =20N/2kg

a=10N/kg^1

a=10m/s^2

ale4655 [162]3 years ago

7 0

Answer:

10 m/s^2

Explanation:

Equation: F = ma.

a = acceleration

m = mass

F = force

Because we are trying to find acceleration instead of force we want to rearrange the equation to solve for a which is F/m = a.

F = 20

m = 2

a = ?

a = F/m

a = 20/2

a = 10 m/s^2

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3 years ago

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2 years ago

The heat capacity of nickel is 0.444 J/(g · °C). Calculate the amount of heat needed to raise the temperature of 18 g of nickel

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The final speed of the nickel at the given quantity of heat is determined as 202.1 m/s.

<h3>Final speed of the nickel</h3>

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1 year ago

An ambulance with a siren emitting a whine at 1790 Hz overtakes and passes a cyclist pedaling a bike at 2.36 m/s. After being pa

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Answer:

The speed of the ambulance is 4.30 m/s

Explanation:

Given:

Frequency of the ambulance, f = 1790 Hz

Frequency at the cyclist, f' = 1780 Hz

Speed of the cyclist, v₀ = 2.36 m/s

let the velocity of the ambulance be 'vₓ'

Now,

the Doppler effect is given as:

$f'=f\frac{v\pm v_o}{v\pm v_x}$

where, v is the speed of sound

since the ambulance is moving towards the cyclist. thus, the sign will be positive

thus,

$v_x=\frac{f}{f'}(v+v_o)-v$

on substituting the values, we get

$v_x=\frac{1790}{1780}(343+2.36)-343$

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2 years ago