answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
cestrela7
1 month ago
5

The uniform 100-kg I-beam is supported initially by its end rollers on the horizontal surface at A and B. by means of the cable

at C, it is desired to elevate end B to a position 3 m above end A. Determine the required tension P, the reaction at A, and the angle q made by the beam with the horizontal in the elevated position.

Physics
1 answer:
Sav [3.1K]1 month ago
8 0

I've included a free body diagram to clarify this issue.

We begin by summing the Moments at point A,

\sum M_A = 0

P(6cos\theta)-981(4cos\theta)=0

P=654N

Next, we perform the summation of Forces in the Y-direction,

\sum F_y = 0

654+R-981 = 0

R=327N

Finally, we determine the angle using the sine function.

sin\theta = \frac{3m}{4m+2m+2m} = \frac{3m}{8m}

\theta = 22.02\°

You might be interested in
A quantum system has three energy levels, so three wavelengths appear in its emission spectrum. the shortest observed wavelength
Softa [3030]
The wavelength released is inversely related to the variation in energy level change. At 278 nm, the energy level change is notably high. The wavelength of 454 nm relates to another change in energy level, although the variation from this wavelength is not as significant as the one prior. It's possible that the subsystems now exhibit very low energy, which could correspond to wavelengths between 700 and 900 nm. Additionally, there's a chance that some metastable subsystems exist within the system, which may lead to LASER emissions.
3 0
2 months ago
A child wants to pump up a bicycle tire so that its pressure is 1.2 × 105 pa above that of atmospheric pressure. if the child us
kicyunya [3294]
The general formula is;
Pressure = Force/Area
Where,
Pressure = Required pressure + Atmospheric pressure = (1.2*10^5) + (101325) = 221325 Pa = 221325 N/m^2

Area = πD²/4 = π*0.035²/4 = 9.621*10^-4 m²

Thus,
Force, F = Pressure*Area = 221325*9.621*10^-4 = 212.94 N
7 0
2 months ago
Read 2 more answers
On a caterpillars map all distances are marked in kilometers . The caterpillars map shows the distance between two milkweed plan
ValentinkaMS [3465]

Answer:

The equivalent distance in kilometers is 4012 ×10^{-6} km.

Explanation:

It's known that 1 millimeter converts to 10^{-3} meters. Then, 1 meter converts to 10^{-3} kilometers. Therefore, the conversion for 1 millimeter to kilometers can be stated as

1 mm = 10^{-3} m

1 m = 10^{-3} km

Thus, 1 mm = 10^{-3}×10^{-3} km = 10^{-6} km.

Given the distance of 4012 mm, the corresponding distance in kilometers will be

4012 mm = 4012 ×10^{-6} km.

The distance therefore is 4012 ×10^{-6} km.

5 0
3 months ago
A skateboarder is attempting to make a circular arc of radius r = 16 m in a parking lot. The total mass of the skateboard and sk
kicyunya [3294]

To address this question, we will utilize concepts linked to centripetal force, aligning it with the static frictional force acting on the object. Using this relationship, we can derive the velocity and input the known values. The defined values are:

r = 16m

m = 82kg

\mu_s = 0.63

The maximum velocity can be determined using centripetal force,

F_c = \frac{mv^2}{r}

Should be equal to,

\frac{mv^2}{r} = \mu_s mg

v = \sqrt{\mu_s gr}

v = \sqrt{(0.63)(9.8)(16)}

v = 9.93m/s

As a result, the highest speed achievable through the arc without slipping is 9.93m/s

3 0
2 months ago
A baseball player exerts a force of 100 N on a ball for a distance of 0.5 mas he throws it. If the ball has a mass of 0.15 kg, w
Keith_Richards [3271]
25.82 m/s Explanation: Given: Force applied by the baseball player; F = 100 N Distance the ball travels; d = 0.5 m Mass of the ball; m = 0.15 kg To find the velocity at which the ball is released, we will equate the work done with the kinetic energy involved. It's important to recognize that work done reflects the energy the baseball player has used. Thus, the relationship can be represented as follows: F × d = ½mv² 100 × 0.5 = ½ × 0.15 × v² Solving gives: v² = (2 × 100 × 0.5) / 0.15 v² = 666.67 v = √666.67 v = 25.82 m/s.
4 0
2 months ago
Other questions:
  • A 250-kg crate is on a rough ramp, inclined at 30° above the horizontal. The coefficient of kinetic friction between the crate a
    15·2 answers
  • An electric motor has a rating of 4.0 x 10^2 watts. How much time will it take for this motor to lift a 50.-kilogram mass a vert
    7·1 answer
  • Two balls of unequal mass are hung from two springs that are not identical. The springs stretch the same distance as the two sys
    12·1 answer
  • A 600 kg car is at rest, and then accelerates to 5 m/s.
    10·1 answer
  • Two atoms collide while moving in a dilute gas. The larger atom has a mass M1 = 6 Daltons and a speed v1 = 200 m/s, while the sm
    10·1 answer
  • A ladybug sits at the outer edge of a turntable, and a gentleman bug sits halfway between her and the axis of rotation. The turn
    7·2 answers
  • A book slides across a level, carpeted floor with an initial speed of 3.25 m/s and comes to rest after 3.25 m. Calculate the coe
    5·1 answer
  • For years, space travel was believed to be impossible because there was nothing there Rockets could push off in space in order t
    8·1 answer
  • A toy uses a spring to shoot an arrow with a suction cup on the end. The toy shoots a 34.2 g arrow and gives it a speed of 5.50
    7·1 answer
  • A proton is located at the point (x = 1.0 nm, y = 0.0 nm) and an electron is located at the point (x = 0.0 nm, y = 4.0 nm). Find
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!