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3 years ago

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A 2.5 kg object has an acceleration of 4 m/s2. What is the force of the object?

1 answer:

Bogdan [553]3 years ago

5 0

Force = Mass × Acceleration

Mass = 2.5 kg

Acceleration = 4 m/s^2

Force = 2.5 × 4

Force = 10 N

The force of the object is <u>10 N</u>

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Write two different unit in which mass is measured.

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Answer:

kilograms and grams

Explanation:

kilograms is the stadard unit for mass according to the SI system.

Grams is another unit for mass.

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3 years ago

What makes the element named iron (Fe) different from the element named nickel (Ni)? A. Iron is a solid but nickel is a gas. B.

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Answer:C, Atoms of iron are different from atoms of nickel.

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3 years ago

2. A small piece of dust is located in between two oppositely charged parallel plates where there exists a uniform electric fiel

Alla [95]

Answer:

a

The total charge is $q = 1.6*10^{-4}C$

b

The change in potential energy is $\Delta U = -4*10^{-2}J$

c

The height is $h= 8.2cm$

Explanation:

From the question we are told that the

The magnitude of electric field is $E = 5000N/C$

The number of proton is $N_p = 1*10^{15}$

The distance between the plates is $d = 5cm = \frac{5}{100} = 0.05m$

The total charge can be mathematically represented as

$q = N_p * e$

Where e is the charge on one proton which has a value of $=1.6*10^{-19}C$

Substituting values

$q = 1 *10^{15} * 1.6*10^{-19} = 1.6 *10^{-4}C$

The change in potential energy is mathematically represented ads

$\Delta U = -(qE)d$

where the negative sign shows that the work done by the electric force is against the electric field

Substituting values

$\Delta U = - 1.6*10^{-4} * 5000 * 0.05$

$= -4*10^{-2}J$

The mass of the bead is given as 0.05kg

The change in potential due to gravity is mathematically given as

$\Delta U = -mgh$

the negative sign is due to the fact that the height is decreasing

And $g =9.8m/s^2$

Making h the subject

$h = \frac{\Delta U}{mg}$

Substituting values

$h = \frac{4*10^{-2}}{0.05 * 9.8}$

$=0.081m = 0.082 *100 = 8.2cm$

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4 years ago

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

sveticcg [70]

Need any help, or are you just giving your points away?

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3 years ago

Read 2 more answers

Which statement correctly describes mass-energy equivalence?

Umnica [9.8K]

<span>Mass is inversely proportional to energy. The larger the mass, the smaller will be the energy.</span>

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3 years ago