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
Yuki888 [10]
3 years ago
15

A block of mass mm starts from rest and slides down from the top of a wedge of height hh and length dd. The surface of the wedge

forms an angle of \thetaθ with respect to the horizontal direction. The force of kinetic friction between the block and the wedge is \vec{f} f ​ . How fast is the block traveling when it reaches the bottom of the wedge?
Physics
1 answer:
lutik1710 [3]3 years ago
6 0

Answer:

v=\sqrt{ 2 (g sin\theta- f/m) d}

Explanation:

Given that

Mass = m

Height = h

Length = d

Angle = θ

Friction force = f

When block slides downward then friction force will act upwards

The force due to gravity along inline plane

Fg= mg sinθ

Lets 'a' is the acceleration

From Newtons law

mg sinθ  - f = m a

a= (g sinθ  - f/m)

Given that initial speed u= o ,lets v is final speed

v²=u²+ 2 a s

v²=2 x (g sinθ  - f/m) x d

v=\sqrt{ 2 (g sin\theta- f/m) d}

You might be interested in
in which place does subduction occur? a. at transform boundaries b. where two plates move apart c. at most normal faults d. wher
Evgesh-ka [11]

Answer;

D. where two plates collide

Explanation;

-Subduction zones are plate tectonic boundaries where two plates converge, and one plate is thrust beneath the other. This process results in geohazards, such as earthquakes and volcanoes.

-Subduction zone volcanism occurs where two plates are converging on one another. One plate containing oceanic lithosphere descends beneath the adjacent plate, thus consuming the oceanic lithosphere into the earth's mantle. This on-going process is called subduction.

3 0
3 years ago
Read 2 more answers
SO! I'VE GOT A COUPLE QUESTIONS RELATING TO SCIENCE (WHERE ARE MY SCIENCE WHIZZES?) TRUST ME THERE WILL BE MORE
Helga [31]

Answer:

nnnnnnnnnnnnnnnnnnnnnnnn

Explanation:

5 0
3 years ago
Read 2 more answers
Suppose that you have a 680 Ω, a 720 Ω and a 1.20 kΩ resistor. (a) What is the maximum resistance you can obtain by combining th
Delvig [45]

Explanation:

As the given data is as follows.

    R_{1} = 680 \ohm ohm\ohm,    R_{2} = 720 \ohm ohm,

   R_{3} = 1.2 k\ohm = 1200 \ohm   (as 1 k ohm = 1000 m)

(a)   We will calculate the maximum resistance by combining the given resistances as follows.

      Max. Resistance = R_{1} + R_{2} + R_{3}

                                  = (680 + 720 + 1200) \ohm ohm

                                  = 2600 ohm

or,                               = 2.6 k\ohm ohm

Therefore, the maximum resistance you can obtain by combining these is 2.6 k\ohm ohm.

(b)   Now, the minimum resistance is calculated as follows.

      Min. Resistance = \frac{1}{R_{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}}

                                 = \frac{1}{680} + \frac{1}{720} + \frac{1}{1200}

                                 = 3.683 \times 10^{-3} ohm

Hence, we can conclude that minimum resistance you can obtain by combining these is 3.683 \times 10^{-3} ohm.

3 0
3 years ago
O be useful in science, a hypothesis must be *
shepuryov [24]

Answer:

the answer is c testable

3 0
3 years ago
Read 2 more answers
A high jumper jumps 2.04 m. If the jumper has a mass of 67 kg, what is his gravitational potential energy at the highest point i
Mariulka [41]

Answer: 1339.5 joules

Explanation:

Gravitational potential energy, GPE is the energy possessed by the jumper as he moves against gravity.

Thus, GPE = Mass m x Acceleration due to gravity g x Height h

Since Mass = 67kg

g = 9.8m/s^2

h = 2.04 metres

Thus, GPE = 67kg x 9.8m/s^2 x 2.04m

GPE = 1339.5 joules

Thus, the gravitational potential energy at the highest point is 1339.5 joules

3 0
3 years ago
Other questions:
  • A major process by which the Sun's energy is transported around the Earth system?
    5·1 answer
  • When a boat is placed in liquid, two forces act on the boat. Gravity pulls the boat down with a force equal to the weight of the
    11·1 answer
  • Which forms first: protoplanets or planetesimals?
    6·1 answer
  • list all the storage forms of energy that forms of energy that you are familiar with. for each storage form, give an example of
    15·1 answer
  • Give at least two examples where people commonly use temperature to control reaction rates.
    14·1 answer
  • Is aluminum a solid liquid or gas at room tem
    13·2 answers
  • The secondary coil of a neon sign transformer provides 7500 V at 0.01 A. The primary coil operates on 120 V. What is the input c
    8·1 answer
  • An electron in the beam of a cathod-ray tube is accelerated by a potential difference of 2.12 kV . Then it passes through a regi
    9·1 answer
  • A scientist performed an investigation involving a reaction that produce AI 2 (SO 4) 3 how many sulfur atoms are represented in
    7·2 answers
  • Another engine reaches its top speed in 7.5s. It is able to perform 250,000 J of wok in that time. How much power this engine ha
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!