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mash [69]
3 years ago
6

1. Jen is stepping out of a boat on to a dock. She has one foot on the dock and one foot in

Physics
1 answer:
Gemiola [76]3 years ago
3 0

you tend to push off with the foot still on the boat.

Newtons 3rd law of motion hold that every action has an equal and opposite reaction.

So, the amount of force you use on your back foot to push yourself onto the dock, has an equal end opposite amount of force going the other way from your sole of your foot, which pushes the boat the other way.

The same principle applies when you fire a cannon - in the pirate films, you see the body of the cannon forced back as it is fired.

Take it one step further, Henry VIII flagship, “Mary Rose fired all its cannons together one day in a broad side, the opposite force rolled the ship over and sank it.

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Helpppppppp please !!!!
agasfer [191]

Answer:

second one is correct that is right

7 0
4 years ago
Two particles with different charges are on the same equipotential line. Do these particles have the same electric potential ene
emmainna [20.7K]

Answer:

both charges will have different potential energies that will depend upon the charge magnitude.

Explanation:

It is given that both the charges are on the same equipotential line which means the potential V at which the two charges are is same.

Now the potential energy of a charge at potential V is given by

q×V where q is the charge value

Thus Higher the charge value for a given value of potential , higher will be the potential energy

Thus the larger charge will have higher potential energy and not the same.

6 0
4 years ago
A horse trots 17 miles north and then turns and trots 24 miles at an angle of 40° west of north. Find the resultant displacement
DanielleElmas [232]

Answer:

 Resultant displacement = 38.58 miles at an angle of 23.57° north of west.

Explanation:

Let north represent positive y direction and east represent positive x direction. Unit vector along x direction is represented by i and vector along unit vector along y direction is represented by j

Initial displacement = 17 miles north = 17 j miles

Final displacement = 24 miles at an angle of 40° west of north = 24 miles at an angle of 130° to positive x -axis

                               = (24 cos 130 i + 24 sin 130 j )

                               = (-15.43 i + 18.36 j ) miles

Total displacement = 17 j + (-15.43 i + 18.36 j) = -15.43 i + 35.36 j

Magnitude of displacement =\sqrt{(-15.43)^2+35.36^2} =38.58 miles

Angle to positive x -axis = tan⁻¹(35.36/-15.43) = 113.57°

Resultant displacement = 38.58 miles at an angle of 23.57° west of north.

8 0
3 years ago
A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of
Aleksandr-060686 [28]

Answer: 39.5 N

Explanation:

2 x force x static friction coefficient = weight  (weight=2μsF)

force = ?

static friction coefficient = 0.416

weight = 32.9N

substituting the values above into the equation we get

2 x F x 0.416 = 32.9

F = 32.9 / (2 x 0.416)

F = 39.5N

4 0
3 years ago
A conducting sphere has a net charge of -4.8x10-17 C. What is the approximate number of excess electrons on the sphere?
Aloiza [94]

Answer:

The number is  N  = 300

Explanation:

From the question we are told that

   The  net charge is  Q =  -4.8 *10^{-17 } \  C

Generally the charge on a electron is e = - 1.60 *10^{-19 } \ C

Generally the number of excess electrons is mathematically represented as

      N  =  \frac{Q}{e}

=>  N  =  \frac{-4.8 *10^{-17}}{-1.60 *10^{-19}}

=>  N  = 300

7 0
3 years ago
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