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Alenkinab [10]
3 years ago
10

A man weighs 650 N. Inside a moving elevator, the floor exerts an upward force of 620 N on the man. What is the magnitude and di

rection of the man's acceleration?
Physics
2 answers:
nikitadnepr [17]3 years ago
6 0

Given that,

Weight of man, W= 650 N

Upward force by elevator, F= 620 N

a = ?

Since,

W = mg

m= W/g =650/9.81

m = 66.25 kg

Since,

F = ma

a = F/m

a = 620/66.25

a = 9.35 m/s²

Acceleration will be 9.35 m/s².

Since the force is in upward direction, it will accelerate the body in upward direction.

cestrela7 [59]3 years ago
3 0

Answer:Man's acceleration is 0.452 \frac{m}{s^{2}} in downward direction

Explanation:

<em>Weight of man, W= 650 N</em>

<em>Normal force exerted by floor of elevator , N= 620 N</em>

<em>Since weight , W = mg</em>

<em>mass m= \frac{W}{g}=\frac{650}{9.8}kg</em>

<em>Using Newtons 2nd law</em>

<em>W-N= ma     where a= acceleration of man in the downward direction</em>

=> 650-620=\frac{650}{9.8}kg\times a

=> a= 0.452 \frac{m}{s^{2}} <em>in downward direction </em>

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Name ten scalar quantity and explain them ​
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2 years ago
A. How many atoms of helium gas fill a spherical balloon of diameter 29.6 cm at 19.0°C and 1.00 atm? b. What is the average kine
Korolek [52]

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a) 3.39 × 10²³ atoms

b) 6.04 × 10⁻²¹ J

c) 1349.35 m/s

Explanation:

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Temperature, T = 19.0° C = 19 + 273 = 292 K

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Volume of the balloon = \frac{4}{3}\pi(\frac{d}{2})^3

or

Volume of the balloon = \frac{4}{3}\pi(\frac{0.296}{2})^3

or

Volume of the balloon, V = 0.0135 m³

Now,

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on substituting the respective values, we get

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0.563 moles will have = 0.563 × 6.022 × 10²³ atoms = 3.39 × 10²³ atoms

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rms speed = 1349.35 m/s

5 0
3 years ago
A piece of rope is pulled by two people in a tug-of-war. each exerts a 400-n force. what is the tension in the rope?
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3 0
3 years ago
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Answer:

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<em>t = -4.5 / -10</em>

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3 0
3 years ago
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