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Lapatulllka [165]
3 years ago
12

A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant sp

eed "vo".
1. The constant horizontal force applied by the woman:
a. has the same magnitude as the weight of the box
b. is greater than the weight of the box
c. has the same magnitude as the total force which resists themotion of the box
d. is greater than the total force which resists the motion ofthe box
e. is greater than either the weight of the box or the totalforce which resists its motion
Physics
1 answer:
d1i1m1o1n [39]3 years ago
6 0

Answer:C

Explanation:

When a constant horizontal force is applied to the box, box started moving in the horizontal direction such that it moves with constant velocity v_0

Constant velocity implies that net force on the box is zero

i.e. there must be an opposing force which is equal to the applied force and friction force can serve that purpose.

So option c is the correct choice.      

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A planar electromagnetic wave is propagating in the +x direction. At a certain point P and at a given instant, the electric fiel
Free_Kalibri [48]

Answer:

B=2.74\times 10^{-10}\ T

Explanation:

It is given that,

A planar electromagnetic wave is propagating in the +x direction.The electric field at a certain point is, E = 0.082 V/m

We need to find the magnetic vector of the wave at the point P at that instant.

The relation between electric field and magnetic field is given by :

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B=\dfrac{E}{c}\\\\B=\dfrac{0.082}{3\times 10^8}\\\\B=2.74\times 10^{-10}\ T

So, the magnetic vector at point P at that instant is 2.74\times 10^{-10}\ T.

3 0
3 years ago
2. Does the emphasis on safety vary for each style of vehicle? In what way?
siniylev [52]

Answer:

Emphasis on public safety can surely reduce the risk for various groups of population

1. Proper education and training must be provided to make them aware of the risks and how they can manage those risks.

2. Proper rules and regulation must be made and strictly followed for example traffic rules so as to avoid accidents.

3. Disaster management teams should to formed to ensure minimal loss of humans and resources during any natural calamity.

4.Eradication of poverty and illiteracy should be priority so as to ensure people focus on more important issues in life rather than involve themselves in trivial things.

Explanation:

8 0
2 years ago
Question 4 (1 point)
djverab [1.8K]

Answer:

directly proportional.

Explanation:

Coulomb's has the formular :

F = kQ₁Q₂ / d²

from the formular F = force

also from the formular Q = charge

hence, from the equation above, force and charge are directly related.so if the charge doubles, the force exerted by it on another charge also doubles because they are directly proportional.

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2 years ago
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