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Firlakuza [10]
3 years ago
15

Which statements describe vectors? Check all that apply. -Vectors have magnitude only. -Vectors have direction only. -Vectors ha

ve both magnitude and direction. -Vectors are drawn using a curved line. -Vectors are drawn using an arrow.
Physics
2 answers:
Natali [406]3 years ago
6 0

Answer:

Vectors have both magnitude and direction

Explanation:

Vectors show how strong the force in because the bigger the arrow, the stronger the force.  Also, it obviously shows direction because its an arrow.

Viktor [21]3 years ago
4 0

Answer:vectors have both magnitude and direction

Explanation:

E.gdislacement it ves in a certain direction and has magnitude

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F= 6m.m2/r^2

F= (6.673x10^-11)(70)(3.32x10^23)/(2.44x10^6)^2


ANS: F= 260 N=2.60x10^2 N
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3 years ago
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what kind of energy does a bow string have when it's stretched? a gravitational potential energy b.elastic potential energy c.ch
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4 years ago
If you push a book against a wall hard enough, it will not slide down even though gravity is pulling it. Use what you know about
Rashid [163]

The frictional force is too much compared to the gravitational force

Explanation:

This is because of the great amount of frictional force between the book and the wall.

Also, the force of gravity on the book is not high enough to cause motion of the book to slide downs.

Frictional force is a force that opposes motion.

  • For the book to slide down, it must overcome the force of friction acting on it opposite to the direction of gravity.
  • According to newton's first law 'a body will remain in its state of rest or uniform motion unless acted upon by an external force'.
  • Assuming the external force is gravitational force, clearly we see that the force is less than the frictional exerted on the book by pinning it to the wall.
  • This frictional force is a static friction that is on a body at rest, it must be overcome by a larger force before motion takes place.

           Fr  >  fg

Fr is the frictional force

fg is the gravitational force

learn more:

Newton laws brainly.com/question/11411375

#learnwithBrainly

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4 years ago
12. Suppose a person is covered head to foot by wool clothing with average thickness of 2.00 cm and is transferring energy by co
Vikki [24]
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2 years ago
Please help!!! I have a physics exam tomorrow and I just can't wrap my head around this one!
Ainat [17]

The total electrostatic force on charge A is 28 \mu N

Explanation:

The magnitude of the electrostatic force between two charges is given by Coulomb's law:

F=k\frac{q_1 q_2}{r^2}

where:

k=8.99\cdot 10^9 Nm^{-2}C^{-2} is the Coulomb's constant

q_1, q_2 are the two charges

r is the separation between the two charges

Here we have three positively charged particles A,B and C, located at the following positions:

x_A = 0\\x_B = 10 m\\x_C = 20 m

The magnitudes of the three charges are:

q_A = q_B = q_C = 0.5 \mu C = 0.5\cdot 10^{-6}C

The force exerted by B on A is to the left (because the force between two positive charges is repulsive), and the force exerted by C on A is also to the left (also repulsive). Therefore, the net force on A is just the sum of the two forces exerted by charges B and C:

F_A = F_{BA} + F_{CA} = k\frac{q_B q_A}{(x_B-x_A)^2}+k\frac{q_C q_A}{(x_C-x_A)^2}=\\=(8.99\cdot 10^9) \frac{(0.5\cdot 10^{-6})^2}{(10)^2}+(8.99\cdot 10^9) \frac{(0.5\cdot 10^{-6})^2}{(20)^2}=2.8\cdot 10^{-5} N = 28 \mu N

Learn more about electric force:

brainly.com/question/8960054

brainly.com/question/4273177

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3 0
4 years ago
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