1answer.
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
MaRussiya [10]
3 years ago
10

The uniform diving board has a mass of 35 kg . A B 0.8 m 4 m Find the force on the support A when a 65 kg diver stands at the en

d of the diving board. The acceleration of gravity is 9.81 m/s 2 . Answer in units of kN.

Physics
1 answer:
andrew11 [14]3 years ago
6 0

Answer:

In other to get the force at the support A, we apply the principle of forces in equilibrium

For a system of forces to be at equilibrium, the sum of all upward forces must be equal to the sum of all downward forces

what are the forces in this system;

for exerted by diver = 65X9.81 = 637.65N = 0.64kN (acting downward)

weight of diving board = 35X9.81 = 343.35N = 0.3434kN (acting downward)

the reaction at point A, the support = RkN (acting upward)

The principle is stated mathematically as:

sum of all upward forces = sum of all downward forces

R = 0.64kN + 0.3434kN = 0.9834kN

hence, the force on the support A is 0.9834kN

Explanation:

First to convert the masses in kg to forces, you multiply by acceleration due to gravity

F = mg

That is how the forces were obtained

Secondly, note that all weight acts downwards and the only force to balance the weights in this system will be the upward reaction from the support at point A

Now you can now apply the principle of forces in equilibrium as stated above to get the unknown force.

You might be interested in
Based on the data table,which car won the race?
kobusy [5.1K]

Answer:

car one

Explanation:

3 0
3 years ago
An experimenter adds 970 J of heat to 1.75 mol of an ideal gas to heat it from 10.0∘C to 25.0∘C at constant pressure. The gas do
ipn [44]

Answer:

(a) ΔU=747J

(b) γ=1.3

Explanation:

For (a) change in internal energy

According to first law of thermodynamics the change in internal energy is given as

ΔU=Q-W

Substitute the given values

ΔU=970J-223J

ΔU=747J

For(b) γ for the gas.

We can calculate γ by ratio of heat capacities of the gas

γ=Cp/Cv

Where Cp is the molar heat capacity at constant pressure

Cv is the molar heat capacity at constant volume

To calculate γ we first need to find Cp and Cv

So

For Cp

As we know

Q=nCpΔT

Cp=(Q/nΔT)

C_{p}=\frac{970J}{1.75mol*(25^{o}C-10^{o}C )}\\C_{p}=37J/mol.K

From relation of Cv and Cp we know that

Cp=Cv+R

Where R is gas constant equals to 8.314J/mol.K

So

C_{v}=C_{p}-R\\C_{v}=37-8.314\\C_{v}=28.687J/mol.K\\

So

γ=Cp/Cv

γ=[(37J/mol.K) / (28.687J/mol.K)]

γ=1.3

4 0
3 years ago
how does spatial pattern of heights illustrate the relationship between temperature density and the rate of vertical pressure ch
Anika [276]

The rate of change of vertical pressure is directly proportional to density and also directly proportional to temperature.

Generally, the relationship between temperature, density and rate of vertical pressure is given as;

\rho = \frac{PM}{RT}

\frac{dP}{dz} = -\rho g\\\\

where;

  • <em>ρ is density</em>
  • <em>T is temperature</em>
  • <em>dP is rate of change of vertical  pressure</em>

Thus, from the formula above, we can conclude the following relationship between temperature, density and the rate of vertical pressure change in spatial pattern of heights.

The rate of change of vertical pressure is directly proportional to density and also directly proportional to temperature.

Learn  more here:brainly.com/question/25395377

5 0
3 years ago
A railroad car moves under a grain elevator at a constant speed of 3.20 m/s. Grain drops into the car at the rate of 240 kg/min.
dedylja [7]

Answer:

F = 768 N                  

Explanation:

It is given that,

Speed of the elevator, v = 3.2 m/s

Grain drops into the car at the rate of 240 kg/min, \dfrac{dm}{dt}=240\ kg/min = 4\ kg/s

We need to find the magnitude of force needed to keep the car moving constant speed. The relation between the momentum and the force is given by :

F=\dfrac{dp}{dt}

F=m\dfrac{dv}{dt}+v\dfrac{dm}{dt}

Since, the speed is constant,

F=m\dfrac{dv}{dt}

F=v\dfrac{dm}{dt}

F=3.2\times 240

F = 768 N

So, the magnitude of force need to keep the car is 768 N. Hence, this is the required solution.

5 0
3 years ago
what is the value of the constant for a second order reaction if the reactant concentration drops from .657 M to ,0981 M in 17 s
yaroslaw [1]

Answer : The value of the constant for a second order reaction is, 0.51M^{-1}s^{-1}

Explanation :

The expression used for second order kinetics is:

kt=\frac{1}{[A_t]}-\frac{1}{[A_o]}

where,

k = rate constant = ?

t = time = 17s

[A_t] = final concentration = 0.0981 M

[A_o] = initial concentration = 0.657 M

Now put all the given values in the above expression, we get:

k\times 17s=\frac{1}{0.0981M}-\frac{1}{0.657M}

k=0.51M^{-1}s^{-1}

Therefore, the value of the constant for a second order reaction is, 0.51M^{-1}s^{-1}

6 0
3 years ago
Other questions:
  • The step by step experiment to determine the cubic expansivity of a liquid
    15·1 answer
  • What is the volume of a 1.2kg and displaced 1.0g/cm3
    10·1 answer
  • Which measurement is equivalent to 350 milliliters?
    11·1 answer
  • What is the wavelength of an earthquake wave if it has a speed of 7km/s and a frequency of 8hz
    6·1 answer
  • Which stage of Erik Erikson’s psychosocial theory of personality is the first one and occurs during infancy?
    15·1 answer
  • An 1,840 W toaster, a 1,460 W electric frying pan, and a 50 W lamp are plugged into the same outlet in a 15 A, 120 V circuit. (T
    7·2 answers
  • A grandfather clock is controlled by a swinging brass pendulum that is 1.2 m long at a temperature of 27°C. (a) What is the leng
    5·1 answer
  • Why is there no ideal time of day when all students should study?
    7·2 answers
  • A wire 1.0 m long experiences a magnetic force of 0.50 N due to a
    8·1 answer
  • NEED HELP ASAP Which of the following chemical equations shows the Law of Conservation of Mass? (1 point)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!