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
anzhelika [568]
2 years ago
5

Your mother asks you to carry a load of wood to the fireplace and lower it to the hearth. In doing this you have used your arms

as levers. Which statement describes this as a class three lever?
Question 13 options:

The wood in your hands was the fulcrum, the load your elbow, and the effort (input force) was supplied by your arm muscles.


The wood was the load in your hands, the fulcrum was your elbow and the effort (input force was supplied by your arm muscles.


The fulcrum was the muscles in your arms, the load was the wood in your hands and the effort (input force) was the elbow.
Physics
2 answers:
Evgesh-ka [11]2 years ago
8 0

Answer: The correct answer is the weight of the wood.

Explanation:

Hope this helps

erica [24]2 years ago
7 0

Answer:

4 more people pls

Explanation:

mark me brainelest pls

You might be interested in
A source charge of 5.0 µC generates an electric field of 3.93 × 105 at the location of a test charge. How far is the test charge
kap26 [50]

Answer:

B. )  0.34 m

I definitely guessed and got the right answer so :))

6 0
3 years ago
Read 2 more answers
You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has—— energy. Calculate
Slav-nsk [51]

Answer:

945 j

Explanation:

You have just given the ball kinetic energy, which is given by the following equation:

KE= 1⁄2 m v2 = 1⁄2 (2.1 kg)(30 m/s)2 = 945 Joules

3 0
3 years ago
I need an expert in physics for help
Elodia [21]
Whatcha need help with ????????
8 0
2 years ago
When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is accelera
Ghella [55]

Answer:

Acceleration is percieved, not constant velocity.

Explanation:

You are most aware when the vehicle is accelerating. At constant velocity you would not be aware of the motion. Only if the system is accelerated the dynamics must be solved considering a pseudo-force (of inertial origin) acting.

It's because of this that:

(A) False. The acceleration can be detected from the inside of a closed car.

(B) False. You would be aware of the motion, but not because humans can sense speed but acceleration.

(C) False. Constant velocity cannot be felt in a closed car.

(D) False. Again, you can't feel constant speed.

6 0
2 years ago
Two sticky spheres are suspended from light ropes of length LL that are attached to the ceiling at a common point. Sphere AA has
a_sh-v [17]

Answer:

  h’ = 1/9 h

Explanation:

This exercise must be solved in parts:

* Let's start by finding the speed of sphere B at the lowest point, let's use the concepts of conservation of energy

starting point. Higher

         Em₀ = U = m g h

final point. Lower, just before the crash

         Em_f = K = ½ m v_{b}^2

energy is conserved

         Em₀ = Em_f

         m g h = ½ m v²

         v_b = \sqrt{2gh}

* Now let's analyze the collision of the two spheres. We form a system formed by the two spheres, therefore the forces during the collision are internal and the moment is conserved

initial instant. Just before the crash

         p₀ = 2m 0 + m v_b

final instant. Right after the crash

         p_f = (2m + m) v

       

the moment is preserved

         p₀ = p_f

         m v_b = 3m v

         v = v_b / 3

         

          v = ⅓ \sqrt{2gh}

* finally we analyze the movement after the crash. Let's use the conservation of energy to the system formed by the two spheres stuck together

Starting point. Lower

          Em₀ = K = ½ 3m v²

Final point. Higher

          Em_f = U = (3m) g h'

          Em₀ = Em_f

          ½ 3m v² = 3m g h’

           

we substitute

         h’=  \frac{v^2}{2g}

         h’ =  \frac{1}{3^2} \  \frac{ 2gh}{2g}

         h’ = 1/9 h

6 0
2 years ago
Other questions:
  • The automobile has a weight of 2700 lb and is traveling forward at 4 ft>s when it crashes into the wall. If the impact occurs
    10·1 answer
  • A wave of amplitude 0.4 m interferes with a second wave of amplitude 0.23 m traveling in the same direction. What is the largest
    14·1 answer
  • How long will it take a person walking at 2.1 m/s to travel 13 m?
    7·1 answer
  • The lower atmosphere is mostly warmed by radiated heat from Earth's surface. However, water heats up and cools down more slowly
    15·2 answers
  • 3. If a vector that is 1 cm long represents a
    15·1 answer
  • What is the measure of disorder in a system called? A. efficiency B. Enthalpy C. Work D. Entropy
    5·2 answers
  • What does the m stand for in the enthalpy equation?
    12·1 answer
  • A student is getting ready to go on a bike ride, but her bike’s back tire is flat! She connects a pump to the valve and adds air
    5·2 answers
  • An object of mass m1​= 5kg placed on a frictionless, horizontal table is connected to a string that passes over a pulley and the
    5·1 answer
  • Which feature of a heating curve indicates a change of state
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!