Physics, 01.08.2019 05:30 tursunovarukhshona

Auniform rod xy of weight 10.0n is freely hinged to a wall at x. it is held horizontal by a force f acting from y at an angle 30° to the horizontal, as shown. what is the value of f? a- 5.0 n b- 8.7cm c- 10.0cm d-20.0cm

Answers: 1

Show answers

Answers

Answer from: noeltan12031

In order to solve the problem, we must require the equilibrium of all the torques acting on the rod. The fixed point is in X, so we have:
- The weight of the rod (mg) acting at the center of the rod (so, at a distance L/2 from X, where L is the length of the rod). So, the torque is
$T_W = mg \frac{L}{2}$
- The vertical component of F (so, $F \sin 30^{\circ}$ ) applied in Y, so at a distance L from X. Its torque is
$F \sin 30^{\circ} L$

The weight points downwards (so, the torque is clockwise), while the torque of F points anti-clockwise, so the equilibrium of torques is
$F \sin 30^{\circ} L = mg \frac{L}{2}$
and since the weight is mg=10 N, re-arranging the equation we find
$F = \frac{10 N}{2 sin 30^{\circ}} = 10 N$

Answer from: zaniyastubbs9

The value of the horizontal force acting on the rod is 10 N. Therefore option (C) is correct.:

Given data:

The weight of rod is, W = 10.0 N.

The angle made by force with respect to horizontal is, $\theta = 30^\circ$ .

To maintain the steady position (equilibrium condition), the vertical component of force F must be balanced by the moment of force due to weight.

Therefore,

$(Fsin\theta) \times L = W \times \dfrac{L}{2} \\\\(F \times sin30^{\circ}) = \dfrac{10}{2} \\F = 10 \;\rm N$

Thus, the value of the horizontal force acting on the rod is 10 N. And option (C) is correct.

Learn more about the equilibrium of forces here:

link

Answer from: Quest

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

Answer from: Quest

cell differentiation is how generic embryonic cells become specialized cells. this occurs through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions.

explanation:

Another question on Physics

Physics, 21.06.2019 22:30

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Answers: 1

Answer

Physics, 22.06.2019 01:30

Which example has gravitational potential energy? a.a horse slowing down from a run b.an apple about to fall from a tree branch c.a bicycle being pedaled down a horizontal path d.beaker sitting on the floor

Answers: 1

Answer

Physics, 22.06.2019 12:30

Brades exam guidelines exam instructions billing & payments & support question 6 of 20 : select the best answer for the question use this illustration to answer the question below. forms & resources al programs 9 ww linics 6. in the circuit shown in the figure above, suppose that the value of r, is 100k, and the value of r2 is 470 kq. at which of the following locations in the circuit would you measure the highest voltage with your meter? rvices 999999 a. between points b and c b. between points a and b c. between points b and e d. between points a and c eredu mark for review (will be highlighted on the review page) mend < < previous question next question

Answers: 1

Answer

Physics, 22.06.2019 14:40

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

Answers: 1

Answer

You know the right answer?

Auniform rod xy of weight 10.0n is freely hinged to a wall at x. it is held horizontal by a force f...

Questions