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
Pavlova-9 [17]
3 years ago
9

Um caminhão de entregas transporta produtos de tamanho e peso elevados, o que requer o uso de máquina simples para facilitar a d

escarga (observe a figura abaixo).
Que máquina simples é representada por essa figura?

(A) Roldanas.

(B) Alavancas.

(C) Rodas e eixos.

(D) Plano inclinado.

Physics
1 answer:
Korvikt [17]3 years ago
8 0
Deez dee dee de de deez Brutus
You might be interested in
Now assume that the frictional force f is not at its maximum value. What is the relation between the torque Ï„ applied to each w
leva [86]

Answer:

a)The direction the frictional force will acts is in the positive x direction.

Explanation:

a)The direction the frictional force will acts is in the positive x direction

b)in the horizontal direction, the total force F(total) is equal to 4times the frictional force in the wheel.

F(total)=4f

''f'' is taken as the frictional force.

c)4times the normal force on each wheel minus the acceleration equals zero i.e 4N(wheel)-a=0

=4N(wheel)-mg=0

d) torque is the force that tends to bend rotation

ζ=rf

but acceleration=4×frictional force

cross multiply

f=ζ/r

f=ma/4

ma/4=ζ/r

a=4ζ/r

5 0
3 years ago
Read 2 more answers
A swimming pool has the shape of a box with a base that measures 30 m by 10 m and a uniform depth of 2.5 m. How much work is req
pav-90 [236]

Answer:

18,375 kJ

Explanation:

Parameters given:

Density of water: 1000 kg/m³

Acceleration due to gravity = 9.8 m/s²

Dimensions of pool = 30m × 10m × 2.5m

Depth of pool = 2.5 m

First we need to find the mass of the water in the pool:

Density = mass/volume

Mass = density * volume

Since the pool is full of water, the volume of the water is equal to the volume of the pool:

Volume = 30 * 10 * 2.5 = 750 m³

Mass = 1000 * 750

Mass = 750,000 kg

We can now find the force required to pump the water out of the pool:

F = m * g

Where m = mass of water

g = acceleration due to gravity

F = 750,000 * 9.8 = 7,350,000 N

The work needed to be done is the product of the force required by the distance the water would need to move to be pumped out (depth of pool):

Work = F * d

Work = 7,350,000 * 2.5

Work = 18,375,000 J = 18,375 kJ

4 0
4 years ago
Read 2 more answers
In a double-slit experiment, light and dark regions are observed on a screen. what causes a dark region to be observed between t
Colt1911 [192]
According to a source, fringes is the answer. These fringes are what causes dark regions in the double -slit experiment conducted that can be observed in the screen.
 Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
7 0
3 years ago
Dis hard for me plz plz answer...
Ann [662]

The correct answer would be it would decrease.

P.S.  If you need any technical support with Windows 10, just send a message to me on Brainly and I'll try to figure it out.

8 0
3 years ago
A mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. It ta
My name is Ann [436]

Answer:

a).K=528.92 \frac{N}{m}

b).m=4.84kg

Explanation:

a).

The work of the spring is find by the formula:

w_s =\frac{1}{2}*k*x^2

So knowing the work can find the constant K'

3.2J =\frac{1}{2}*k*(0.11m)^2

Solve for K'

K=\frac{2*W_s}{x^2}=\frac{2*3.2J}{0.11m^2}

K=528.92 \frac{N}{m}

b).

The force of the spring realice a motion so using the force and knowing the accelerations can find the mass

F=m*a

m=\frac{F}{a}=\frac{K*x}{a}

m=\frac{528.9*0.11m}{12m/s^2}

m=4.84kg

8 0
3 years ago
Other questions:
  • The quark composition of the proton and neutron are, respectively, uud and udd, where u is an up quark (charge +23e) and d is a
    14·1 answer
  • While painting the top of an antenna 275 m in height, a worker accidentally lets a 1.00 L water bottle fall from his lunchbox. T
    8·1 answer
  • A roller coaster starts from rest at the top ofan 18m hill.
    5·1 answer
  • Which change is the best example of a physical change?
    11·1 answer
  • What electromagnetic wave has the most energy?
    9·2 answers
  • Two copper wires have the same length, but one has twice the diameter of the other. Compared to the one that has the smaller dia
    14·1 answer
  • Match each vocabulary word with the correct definition. 1. measure of how quickly velocity is changing 2. speed in a given direc
    7·2 answers
  • 1000 kg car takes travels on a circular track having radius 100 m with speed 10 m/s. What is the magnitude of the acceleration o
    11·1 answer
  • A 1,000 kg truck initially had a velocity of 9 m/s. A force acts on it for a duration of time. After that force, the truck now h
    7·1 answer
  • What is the relationship between frictional force and the normal force
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!