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3 years ago

A force of 31 N south is used to accelerate an object uniformly from rest to 8 m/s in 22 s. What is the mass of the object?

Physics

2 answers:

natulia [17]3 years ago

8 0

Answer:

Explanation:

Givens

F = 31 N

vi = 0

vf = 8 m/s

t = 22 seconds

m = ?

Formula

F = m ( vf - vi)/t

Solution

31 = m (8 - 0) / 22 Multiply both sides by 22

31 * 22 = 8 * m

8m = 682 Divide by 8

m = 682 / 8

m = 85.25

harina [27]3 years ago

4 0

this question is centered around newtons second law f=ma

First you need to find the acceleration

$acceleration = \frac{8 - 0}{22}$

that gives you 0.36 recurring(on both numbers) m/s²

mass= force ÷ acceleration

$mass = \frac{31}{0.36recurring}$

mass= 85.25 kg

if you want to check

f=ma

85.25 × 0.36 recurring (remember its on both numbers not just 6) = 31 N

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3 years ago

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Answer:

The dimension is L

Explanation:

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3 years ago

A rocket in deep space has an empty mass of 220 kg and exhausts the hot gases of burned fuel at 2500 m/s. What mass of fuel is n

Scilla [17]

Answer:

Explanation:

Let fuel is released at the rate of dm / dt where m is mass of the fuel

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= d ( mv ) / dt

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v dm / dt = 220 dv / dt

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3 years ago

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