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
ch4aika [34]
3 years ago
12

Two very quick questions!!

Physics
2 answers:
stepladder [879]3 years ago
8 0
<span>The weight lifted by a machine to the applied force on a machine is called mechanical advantage. This is written as Mechanical advantage, M. A, = load(weight)/effort. So for 1) M.A = 2 and load = 2, 000lb = 8896.446N. So 2 = 8896.446/ effort Effort = 8896.446/2 = 4448.48 Similarly for M.A of 2, 000, 000 we have Effort = 8896.446/ 2, 000, 000 = 0.004448</span>
lana [24]3 years ago
5 0

Explanation:

1. Mechanical advantage of a pulley system, m = 2

Mechanical advantage of a machine is defined as the ratio of load to the effort force i.e.

m=\dfrac{F_L}{F_E}

Here, F_L=2000\ lb

F_E=\dfrac{F_L}{m}

F_E=\dfrac{2000\ lb}{2}

F_E=1000\ lb

Hence, 1000 lb effort will be needed to move the car.

2. Mechanical advantage of a pulley system, m = 2,000,000

Value of load, F_L=2000\ lb

Mechanical advantage, m=\dfrac{F_L}{F_E}

F_E=\dfrac{F_L}{m}

F_E=\dfrac{2000\ lb}{2000000}

F_E=0.001\ lb

Hence, 0.001 lb effort would be needed to move the car.

You might be interested in
Write about Archimedes principle​
Schach [20]

Answer:

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces. Archimedes' principle is a law of physics fundamental to fluid mechanics.

8 0
2 years ago
Read 2 more answers
You are in the forest with some of your friends. You’re being chased by a very angry and hungry bear.
melomori [17]

Answer:

2m head start or else you done for

Explanation:

you cant even out run a bear they run at 35mph the fastest human is 25

8 0
3 years ago
If a particular atom of an element has five protons a neutral atom of this element would have ________ electrons. A. 0 B. 3 C. 5
Bezzdna [24]
C. 5

a neutral atom has no electrical charge. protons are positive and electrons are negative, they need to be the same to make it a neutral atom.
5 0
3 years ago
Read 2 more answers
Imagine you are holding an apple. how could you increase the potential energy of this apple?
Ray Of Light [21]

If you're holding the apple at your waist, lift it to your mouth.
Potential energy relative to any level is proportional to its height
above that level.  Increase that height, and you've increased the
potential energy.

Since energy is conserved ... it never magically appears or
disappears ... you need to tell where that extra energy for the
apple came from.

It's exactly the work you did ... the force of your muscles acting
through the distance you raised the apple ... that became the
additional potential energy that the apple gained.

6 0
3 years ago
When a 4-kg ball is thrown upwards at 40 m/s, at what
arlik [135]

Answer:

the height of the potential energy is 3,200 J

Explanation:

The computation of the kinetic energy is shown below:

Kinetic energy = 1 ÷ 2 × mass × velocity^2

= 1 ÷ 2 × 4 kg × 40 m/s^2

= 3,200 J

Hence the height of the potential energy is 3,200 J

4 0
3 years ago
Other questions:
  • A car races around a circular track. Friction on the tires is the what that acts toward the center of the circle and keeps the c
    6·1 answer
  • Which of the following would be the least reliable source of information? A science textbook B government internet site C weekly
    14·2 answers
  • First to answer will be the brainliest i need the answer ASAP
    5·1 answer
  • A light bulb has a power output of 80 W and it has been left on for 90 seconds. How much work was done?
    13·1 answer
  • What do the spheres in this model represent?
    12·2 answers
  • Wood, plastic, rubber and glass are ________, which are materials that electricity cannot easily flow through.
    5·1 answer
  • In the attachment there is a density column where there is colour
    10·2 answers
  • A car travels eastwards at 60km/h for 2h, then travels northwards at 20km/h for 8h. Find,
    13·1 answer
  • When there are too many neutrons compared to the number of protons, the atomic nucleus is
    6·1 answer
  • How much work does a football player do in the weight room when he squats 150 kg up a distance of 1 meter?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!