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
Troyanec [42]
3 years ago
15

A rubber-wheeled 50 kg cart rolls down a 35 degree concrete incline. Coefficient of rolling friction between rubber and concrete

is = 0.02. (a) What is the cart's acceleration if rolling friction is neglected? (b) What is the cart's acceleration if rolling friction is included?
Physics
1 answer:
lapo4ka [179]3 years ago
8 0

Answer:

(a) 5.62 m/s²

(b) 5.46 m/s²

Explanation:

The given values are:

mass,

m = 50 kg

angle

= 35°

(a)

If friction neglected,

⇒ F_x=mgSin \theta=ma

⇒ a_x=gSin \theta

       =9.8 \ Sin35^{\circ}

       =5.62 \ m/s^2

(b)

If friction present,

⇒ F_x=mgCos \theta

⇒ F_x=mgSin \theta-\mu_r mgCos \theta

⇒ a=gSin \theta-\mu_rgCos \theta

      =9.8 \ Sin35^{\circ}-0.02\times 9.8 \ Cos30^{\circ}

      =5.46 \ m/s^2

You might be interested in
Find the net force produced by a 6 N and an 8 N when acting in same
tankabanditka [31]

Answer:

14 newtons  is the answer

Explanation:

because if they act in the same direction they are added together

5 0
2 years ago
Read 2 more answers
Which of the following statement(s) about energy and phase is/are correct? Select all that apply. Choose one or more: A. While o
Free_Kalibri [48]

Answer: Option (A) and (D) are the correct statements.

Explanation:

Potential energy is defined as the energy obtained by an object due to its position. Whereas kinetic energy is defined as the energy obtained by an object due to  the motion of its molecules.

When there will be only one phase present then addition or removal of energy will lead to change in kinetic energy of the substance but no change in potential energy will take place.

Whereas if change in phase is occurring then adding or removing any energy will lead to change in potential energy of the substance while kinetic energy will remain the same.

Thus, we can conclude that correct statements are as follows.

  • While only one phase is present, adding or removing energy changes PE but not KE.
  • During a phase change, adding or removing energy changes PE but not KE.
3 0
3 years ago
Which of the following phrases describes a motor?
Delicious77 [7]
Your answer is d I believe
7 0
3 years ago
A block floats partially submerged in a container of liquid. When the entire container is accelerated upward, which of the follo
Nookie1986 [14]

Answer:C

Explanation:

Partially submerged block along with vessel is accelerated upwards .

Initially the block weight is supported by buoyant force such that it is in equilibrium.

when the system start accelerating upwards then the effective gravity will be

g+a where a is the acceleration of the system.

so only net gravity is increased so block will not ascend or descend.

Mathematically

F_b=weight

\rho _L\cdot V\cdot (g+a)=m(g+a)

where \rho _L=density of liquid

V=volume of object inside the water

                         

7 0
3 years ago
When light waves passes straight through an object, it is called?
amm1812
<h3><u>Answer;</u></h3>

Transmission

<h3><u>Explanation;</u></h3>
  • <em><u>Light waves are types of waves that are electromagnetic waves, meaning they do not require material medium for transmission. </u></em>Light is transmitted as a transverse wave such that the vibration of particles is perpendicular to the direction of wave motion.
  • <em><u>A material medium enables the transmission of a wave by the vibration of particles, atoms or molecules. </u></em>The vibration of particles in a medium helps in the transmission of a wave such that energy is transferred from one point to another due to the disturbance caused by the wave.
4 0
3 years ago
Read 2 more answers
Other questions:
  • A capacitor consists of two metal surfaces separated by an insulating layer. A new capacitor has no charge on either of its surf
    8·1 answer
  • 96 K = _____<br> -177°C<br> 0°C<br> 96°C<br> 369°C
    6·1 answer
  • The distance traveled by an ibject divided by thr time it takes to travel that distance is called?
    7·1 answer
  • The speed of water flowing through the 4in diameter section of the piping system is 3ft/s. What is the volume flow rate of water
    9·1 answer
  • Sharon the ant (Aaron’s sister) sits at the edge of a turntable of radius R that is spinning with period T. As she makes one-hal
    6·1 answer
  • You toss a ball straight up with an initial speed of 30m/s. How high does it go, and how long is it in the air (neglecting air r
    7·1 answer
  • Describe how a neutral material becomes attracted to a negatively charged object brought near it.
    13·1 answer
  • 0.
    6·1 answer
  • A balloon was filled to a volume of 2.50 LL when the temperature was 30.0∘C30.0∘C. What would the volume become if the temperatu
    5·1 answer
  • why do this I'm trying to cheat and you put a question omgggggggggggggggggggggg!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!