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Diano4ka-milaya [45]

4 years ago

5

In what direction is there a net force of 200? A. Left B.rightC.upD. Down

1 answer:

Elodia [21]4 years ago

3 0

Answer: B. Right

Explanation:

According to this Free Body Diagram we have:

$\sum F_{y}=300 N - 300 N = 0 N$

$\sum F_{x}=-200 N + 400 N = 200 N$ (being the left negative and the right positive)

So, since the magnitude of the net force is positive its direction is to the right.

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Pressing two objects together with more force ______ friction.

Alenkinab [10]

Answer : Option A) Increases.

Explanation : Pressing two objects together with more force will increase the friction.

Friction is defined as the resistance to motion of an object which is relative to another.

If the forces acting between the two objects are found to be vertical then they will have an effect of increased friction as they increase the weight.

When forces are assumed to be horizontal then, the result of weight gets multiplied by the coefficient of friction which will result in having no effect on the friction.

5 0

4 years ago

Read 2 more answers

A gas engine that operates on a Brayton cycle has an efficiency of 0.25. On a cold day, the temperature of the air drawn into th

Gnom [1K]

Answer:

356K

Explanation:

use this formula for brayton cycle

∩=1-(Tin/Tout)

where

∩=efficiency

Tin= inlet temperature

Tout= outlet temperature

solving

Tout=Tin/(1-∩)

Tout=267K/(1-0.25)

Tout=356K

4 0

3 years ago

Consult Multiple-Concept Example 5 for insight into solving this problem. A skier slides horizontally along the snow for a dista

antoniya [11.8K]

The initial velocity of the skier is 4.5 m/s

Explanation:

There is only one force acting on the skier in the horizontal direction, and it is the force of friction, whose magnitude is

$F_f = -\mu_k mg$

where

$\mu_k = 0.050$ is the coefficient of kinetic friction

m is the mass of the skier

$g=9.8 m/s^2$ is the acceleration of gravity

The negative sign is due to the fact that the direction of the force of friction is opposite to the direction of motion of the skier.

According to Newton's second law, the net force acting on the skier is equal to the product between his mass and his acceleration, so we can write:

$F=ma\\ \rightarrow -\mu_k mg = ma$

So, the acceleration of the skier is

$a=-\mu_k g$

Now we can apply the following suvat equation to find the initial velocity of the skier:

$v^2-u^2=2as$

where

v = 0 is the final velocity (he comes to a stop)

u is the initial velocity

s = 21 m is the displacement

a is the acceleration

Substituting the equation for the acceleration and solving for u, we find

$u=\sqrt{v^2-2as}=\sqrt{-2(-\mu_k g) s}=\sqrt{2(0.050)(9.8)(21)}=4.5 m/s$

Learn more about accelerated motion here:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

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#LearnwithBrainly

5 0

3 years ago

A fox ﬂeeing from a hunter encounters a 0.700 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.

iris [78.8K]

Answer:0.61 m

Explanation:

Given

Initial velocity (u)=7.40 m/s

launch angle $\theta =45^{\circ}$

height of fence=0.7 m

Trajectory of Projectile is given by

$y=x\tan \theta -\frac{gx^2}{2u^2\cos^2\theta }$

For x=2.1 m

$y=2.1\tan (45)-\frac{9.8\times 2.1^2}{2\times 7.4^2\times (\cos 45)^2}$

$y=2.1-0.789$

$y=1.31 m$

At x=2.1 m Y=1.31

therefore Fox clear fence by a margin =1.31-0.7=0.61 m

7 0

3 years ago

Potassium is a crucial element for the healthy operation of the human

Dovator [93]

The second one if it’s on edge

8 0

3 years ago