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
emmainna [20.7K]
3 years ago
5

A plank of length L and mass M hangs from an axle passing through one end. The other end is allowed to hang down so that it just

brushes a workbench. You place a box of height h and mass m so that it just touches the plank when sitting on the bench. You then raise the plank up, turning around the axle, so that its movable end is a height H above the bench. You let the plank go, it pivots around the axle, and hits the ball elastically. How fast does the box move after the collision if it slides without friction?
Physics
1 answer:
galben [10]3 years ago
6 0

Answer:

v = ((M(√2gH)/3m)

Explanation:

Initial Moment of Inertia= Moment of Inertia of Rod

I = (ML²)/3

Linear Velocity of moveable end of the rod, just before collision is given by = v = (√2gH)/L

Initial Angular Momentum, about the point of the suspension:

Li= Iw = {(ML²)/3} . {(√2gH)/L} = {ML(√2gH)}/3

Final Angular Momentum = Li = mvl, where 'v' is the speed of the mass 'm' after the collision

Since the collision is elastic, all momentum will be conserved, which means

Initial Angular Momemtum = Final Angular Momentum

{ML(√2gH)}/3 = mvL

solving for v = {(M)/3m} . {(√2gH)/L}

You might be interested in
Which diagram represents deposition?
Vera_Pavlovna [14]

Your answer will be gas

3 0
3 years ago
What is an accurate definition of a heat engine? A. a system that converts mechanical energy into thermal energy B. a system tha
Verizon [17]

Answer:

C

Explanation:

C. a system that converts thermal energy into other useful forms of energy

5 0
3 years ago
Read 2 more answers
An RL circuit contains a resistor with R = 6800 Ω and an inductor with L = 2300 µH. If the impedance of this circuit is 160,000
Rainbow [258]

| Impedance | = √ [R² +(ωL)²]

R² = 6800² = 4.624 x 10⁷
 
(ωL)² = (2 · π · f · 2.3 · 10⁻³)²

          = 2.0884 x 10⁻⁴  f²

| Z | =  √[ (4.624 x 10⁷) + (2.0884 x 10⁻⁴ f²) ]  =  1.6 x 10⁵

     (1.6 x 10⁵)²  =  (4.624 x 10⁷) + (2.0884 x 10⁻⁴ f²)

     (2.56 x 10¹⁰) - (4.624 x 10⁷)  =  2.0884 x 10⁻⁴ f²


Frequency² =   (2.56 x 10¹⁰ - 4.624 x 10⁷)  /  2.0884 x 10⁻⁴

                    =       2.555 x 10¹⁰ / 2.0884 x 10⁻⁴

                    =          1.224 x 10¹⁴ 

                    =          122,400 GHz          <== my calculation

                                      11.1 MHz           <== online impedance calculator

Obviously, I must have picked up some rounding errors
in the course of my calculation. 
  











7 0
3 years ago
Which statement is supported by this scenario?
Temka [501]

Answer:

For Yanni, the speed of the ball is 15 m/s, and for the quarterback, the speed of the ball is 8 m/s.

Explanation:

6 0
3 years ago
Read 2 more answers
Can you please send me the answers of these pls <br>I will make you brainlist <br> ​
olga nikolaevna [1]

Answer:

a)= technology is any appliances which makes our work very fast without much manual effort.It is used to make our life simple and easy.

3 0
3 years ago
Other questions:
  • What is the purpose of heat index
    7·2 answers
  • Before leaving an incident assignment, you should do all of the following EXCEPT FOR:
    9·1 answer
  • Why are hurricanes considered more damaging than tornadoes when tornadoes have stronger winds
    12·2 answers
  • When a compass needle settles down in a magnetic field, _______. the needle aligns itself with the field, the south end of the c
    8·1 answer
  • Two blocks of aluminum (specific heat c=0.22 cal/g Celsius) with masses of 1000 g and 100 g are at a temperature of 70 c. Which
    7·1 answer
  • A 5 cm spring is suspended with a mass of 3.8589 g attached to it which extends the spring by 1.5747 cm. The same spring is plac
    8·1 answer
  • Help me with this please ​
    10·2 answers
  • I need emergency help we only have 3 minutes left
    14·1 answer
  • A 60-kg passenger is in an elevator which is initially at rest. The elevator starts to travel downward. It reaches a downward sp
    11·1 answer
  • 19. A 0.0340 kg bullet traveling at 120 m/s embeds itself in a 1.24 kg wooden block which
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!