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AVprozaik [17]
3 years ago
9

Which best describes Sid’s error?

Physics
2 answers:
NARA [144]3 years ago
8 0

Answer:

Centripetal force is perpendicular to the velocity of the satellite.

Explanation:

Centripetal force acts when a body is in circular motion. It acts towards the center of the circular orbit along the radius. Tangential speed remains constant and acts along the tangent, perpendicular to the radius of the the circular orbit. The centripetal acceleration acts along the direction of the centripetal force i.e. along the radius.

Thus, tangential speed is perpendicular to the centripetal force.

Sid's error is that he has written that centripetal force acts parallel to the velocity of the satellite. The satellite revolving around the earth has constant tangential speed. The centripetal force is perpendicular to the velocity of the satellite and points towards the earth.

Slav-nsk [51]3 years ago
7 0

Explanation :

First considering Sid's statements, the description of tangential speed and centripetal acceleration are correct.

But for Centripetal force, the description is incorrect because centripetal force is always perpendicular to the velocity.

Sid's error can be corrected by the statement (b) i.e. "Centripetal force is perpendicular to the velocity of the satellite".  

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zubka84 [21]

Answer:

Explanation:

Given that,

Mass of sledge hammer;

Mh =2.26 kg

Hammer speed;

Vh = 64.4 m/s

The expression fot the kinetic energy of the hammer is,

K.E(hammer) = ½Mh•Vh²

K.E(hammer) = ½ × 2.26 × 64.4²

K.E ( hammer) = 4686.52 J

If one forth of the kinetic energy is converted into internal energy, then

ΔU = ¼ × K.E(hammer)

∆U = ¼ × 4686.52

∆U = 1171.63 J

Thus, the increase in total internal energy will be 1171.63 J.

4 0
4 years ago
Helpp pleaseeeeee …..
Lilit [14]

Answer:

300 cos 30 = 40 a + 40 * .2 * 10

Total force = mass * acceleration + frictional force

260 = 40 a + 80

a = 180 / 40 = 4.5 m/s^2

Check:

15 a + 15 * 10 * .2 = T    acceleration of 15 kg block (assuming a = 4.5)

T = 15 (4.5) + 30 = 97.5     force required to accelerate 15 kg block

260 - 97.5 = 162.5     net force on 25 kg block

162.5 = 4.5 (25) + 25 * 10 * .2

162.5 = 112.5 + 50 = 162.5

4.5 m/s^2 checks out as correct

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Multiply these numbers and there’s your answer
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Martije has made a slight error in naming a compound monocarbon tetrabromide. What compound is she most likely naming, and what
Alik [6]

Answer: CBr_4 : carbon tetrabromide

Explanation:

CBr_4 is a covalent compound because in this compound the sharing of electrons takes place between carbon and bromine. Both the elements are non-metals. Hence, it will form covalent bond.

The naming of covalent compound is given by:

1. The less electronegative element is written first.

2. The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.

3. If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.

Hence, the correct name for CBr_4 is carbon tetrabromide.

7 0
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Answer:

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