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
Pavlova-9 [17]
2 years ago
6

Can work output exceed work input? Yes No

Physics
1 answer:
Svetach [21]2 years ago
6 0
Yes ,you can work output exceed work input
You might be interested in
A 48.0-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocit
Kipish [7]

Answer:

F = 47.6 N

Explanation:

  • Newton's 2nd law can be expressed as the rate of change of the total momentum, respect of time, as follows:

       F = \frac{\Delta p}{\Delta t}

  • So, in order to find the average force exerted by the skater on the wall, we can find the change in momentum due to the force exerted by the wall (which is equal and opposite to the one exerted by the skater), and  divide it by the time interval , as follows:

       F_{wall} = \frac{\Delta p}{\Delta t} =\frac{(48.0 kg*(-1.06m/s)}{1.07s} = -47.6 N

       ⇒ Fsk = 47.6 N (normal to the wall)

3 0
3 years ago
A man does 4,475 J of work in the process of pushing his 2.50 103 kg truck from rest to a speed of v, over a distance of 26.0 m.
Tcecarenko [31]

Answer:

a) 1.89 m/s  b) 172.1 N

Explanation:

a)

  • Applying the work-energy theorem, if we can neglect the friction between truck and road, the total change in kinetic energy must be equal to the work done by the external forces.
  • This work, is just 4,475 J.
  • So we can write the following equation:

        \Delta K = \frac{1}{2} * m*v^{2} = 4,475 J

  • where m= mass of the truck = 2.5*10³ kg.
  • So, we can find the speed v, as follows:

        v =\sqrt{\frac{2*W}{m}} =\sqrt{\frac{2*4,475J}{2.5e3kg} }  = 1.89 m/s

b)

  • The work done by the man, is just the horizontal force applied, times the displacement produced by the force horizontally:

        W = F*d

  • We can solve for F, as follows:

        F = \frac{W}{d} = \frac{4,475 J}{26.0m} =  172.1 N

4 0
2 years ago
How many moles of MgCl2 are there in 329 g of the compound?<br><br> Your Answer:
Nookie1986 [14]

Answer:3.46

Explanation:

mass=329

molar mass=71

no. of moles=329/71

=3.46

6 0
3 years ago
Read 2 more answers
Pls help I’m being timed!!
Firdavs [7]

Answer:

B

Explanation:

Heat increase molecular motion

6 0
3 years ago
Read 2 more answers
As Douglas considers his wife’s condition, he realizes that the change having the most impact is “the one that began to steal he
Tanya [424]
I believe that the loss of Phyllis' recollections is thought to be the most heartbreaking side effect of her ailment in light of the fact that once a man's memory scatters then piece of the individual begins to vanish with them. A memory holds a considerable measure of essential data, for example, people's identity, where They have lived, and their connections that they have had with individuals.
8 0
3 years ago
Other questions:
  • 1 point
    8·1 answer
  • Heliox is a helium‑oxygen mixture that may be used in scuba tanks for divers working at great depths. It is also used medically
    6·1 answer
  • Your friend claims that weather predictions are just guesses. What would you say to change your friend's mind?
    6·1 answer
  • Write an essay: qualities of the best student​
    14·1 answer
  • You are looking at yourself in a plane mirror, a distance of 3 meters from the mirror. Your brain interprets what you are seeing
    5·1 answer
  • collection of such objects we observe that they emit electromagnetic radiation of three different energies: 0.7 eV (infrared), 2
    6·1 answer
  • A proton enters a magnetic field (B = 5.00 x 10^-2 T INTO THE PAGE) with
    13·1 answer
  • A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is
    10·1 answer
  • Object A has a mass of 8.0 kg and is accelerating at 4.0 m/s2. Object B has a mass of 10.0 kg and is accelerating at 3.0 m/s2. O
    7·1 answer
  • There are many muscles in our body. our body uses muscles to move parts of our body. a part that needs to move a lot will have a
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!