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3 years ago

Sliding friction is _ than the static friction.

Physics

1 answer:

Alona [7]3 years ago

4 0

Answer:

less

Explanation:

Sliding friction is always less than static friction. This is because in sliding friction, the bodies slide with each other and thus the effect of friction is not more. However, it does not happen in the case of static friction.

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A uniform horizontal beam of weight 481 N and length 3.32 m has two weights hanging from it. One weight of 381 N is located 0.87

Andre45 [30]

Answer:

1143 N at 1.59 m from the left end

Explanation:

For the system to produce equilibrium, the total force and moment must be 0. Since the total weight downward is

481 + 381 + 281 = 1143 N

Therefore the magnitude of the force acting upward to balance this system must be the same of 1143 N

That alone is not enough, we also need the position of the force for the total moment to be 0.

Let x be the length from the this upward force to the left side. And let the left point be the point of reference for moment arm:

481 * 3.32/2 + 381 * 0.8798 + 281*(3.32 - 0.8798) - 1143*x = 0

x = (481*1.66 + 381 * 0.8798 + 281*2.4402)/1143 = 1.59m

5 0

4 years ago

Geology belongs to which main category of science?

sergey [27]

Geology belongs to the category of Natural Sciences. Natural sciences is the study of natural phenomena. Among the natural sciences, we have physical science, which is the study of non-living systems. Further along this branch, we have earth sciences where Geology belongs.

7 0

3 years ago

There is a fixed voltage across a resistor, and you measure a current of c1 A. If you replace the resistor with one that has twi

prisoha [69]

Answer:

Option B

Explanation:

Given

The current flowing through the circuit = 1 Ampere

As we know

I is inversely proportional to resistance.

I α 1/r

or I = k/r

If the resistor "r" is replaced by any resistor "R" with resistance = 2r, then the current will be

I = 1/2 of 1 ampere

I = 0.5 Ampere

Hence, option B is correct

4 0

3 years ago

If log 3 4=1.2619, evaluate log3 0.25. give your answer to four decimal places

Vera_Pavlovna [14]

Explanation:

log₃0.25

= log₃(4⁻¹)

= -log₃4

= -1.2619

8 0

4 years ago

A student throws a rock horizontally from the edge of a cliff that is 20 m high. The rock has an initial speed of 10 m/s. If air

Valentin [98]

<h2>Option C is the correct answer.</h2>

Explanation:

Consider the vertical motion of rock,

We have equation of motion s = ut + 0.5 at²

Initial velocity, u = 0 m/s

Acceleration, a = 9.81 m/s²

Displacement, s = 20 m

Substituting

s = ut + 0.5 at²

20 = 0 x t + 0.5 x 9.81 x t²

t = 2 s

After 2 seconds it reaches ground,

Now consider the horizontal motion of rock,

We have equation of motion s = ut + 0.5 at²

Initial velocity, u = 10 m/s

Acceleration, a = 0 m/s²

Time, t = 2 s

Substituting

s = ut + 0.5 at²

s = 10 x 2 + 0.5 x 0 x 2²

s = 20 m

Distance traveled is 20 m

Horizontal distance traveled = 20 m

Option C is the correct answer.

8 0

3 years ago