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ser-zykov [4K]
3 years ago
11

Which of the following statements must be true if the net force on an object is zero? Choose all that apply. a) The object must

have zero acceleration. b) The object must be at the origin. c) The object must have constant velocity. d) The object must be at rest.
Physics
1 answer:
Alika [10]3 years ago
3 0

Answer:a & d

Explanation:

Given

Net force on object is zero i.e. F_{net}=m\cdot a_{net}=0

a_{net}=0

if net acceleration is zero therefore change in velocity is zero i.e. velocity is constant

It is not necessary that when an object is at rest acceleration on it is zero for example during Simple harmonic motion of spring mass system when mass is at maximum amplitude i.e. momentarily at rest then its acceleration is maximum.

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A tetrahedron has an equilateral triangle base with 25.0-cm-long edges and three equilateral triangle sides. The base is paralle
KATRIN_1 [288]

Answer:

electric flux through the three side = 2.35 N m²/C

Explanation:

given,

equilateral triangle of base = 25 cm

electric field strength = 260 N/C

Area of triangle = \dfrac{\sqrt{3}}{4}a^2

                          =  \dfrac{\sqrt{3}}{4} 0.25^2

                          = 0.0271 m³

electric flux = E. A

                   = 260 × 0.0271

                   = 7.046 N m²/C

since, tetrahedron does not enclose any charge so, net flux through tetrahedron is zero.

electric flux through the three side = (electric flux through base)/3

                               = \dfrac{7.046}{3}

electric flux through the three side = 2.35 N m²/C

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Which among the following statement/s is correct?
seropon [69]

Answer:

(D) None

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