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ollegr [7]
3 years ago
8

A graph of the net force F exerted on an object as a function of x position is shown for the object of mass M as it travels a ho

rizontal distance 3d . Which expression represents the change in the kinetic energy of the object?
Physics
1 answer:
saul85 [17]3 years ago
5 0

The change in kinetic energy is \Delta K = 3Fd

Explanation:

According to the work-energy theorem, the work done on an object is equal to the change in kinetic energy of the object. Mathematically:

W=K_f -K_i= \Delta K

where :

W is the work done on the object

K_f is the final kinetic energy of the object

K_i is the initial kinetic energy

Also, the work done on an object is (assuming that the force is applied parallel to the motion of the object):

W=F\Delta x

where

F is the magnitude of the force

\Delta x is the displacement of the object

In this problem, the force acting on the object is

F

While the displacement is the horizontal distance travelled, so

\Delta x = 3d

Therefore, the work done is

W=(F)(3d)=3Fd

And so the change in kinetic energy is

\Delta K = 3Fd

Learn more about work and kinetic energy:

brainly.com/question/6763771

brainly.com/question/6443626

brainly.com/question/6536722

#LearnwithBrainly

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Which players are usually the tallest on their team, and stay close to the basket so they can shoot and rebound the ball?
alexdok [17]

Answer:

Center

Explanation:

The center is the tallest player on each team, playing near the basket. On offense, the center tries to score on close shots and rebound. But on defense, the center tries to block opponents' shots and rebound their misses.

7 0
3 years ago
Please help! Will give brainly, 50 points!! I'm stuck with this question and I don't get it!!
IrinaVladis [17]

Answer:

3.52176 x 10^-10 N

Explanation:

Fg = 3.52176 x 10^-10 Newton

8 0
3 years ago
Which fractures tend to occur first when a pane of glass is struck?
Irina18 [472]

Radial fractures tend to occur first when a pane of glass is struck.

Answer: Option A

<u>Explanation:</u>

There is a slight difference between radial and concentric fractures and as radial fractures are formed which extends outwards in a radial manner  from the point where the glass is struck.

Whereas concentric fractures are circular in pattern and they terminate long before radial crack. Also when a bullet is fired from a gun, a similar reaction is observed as it gets struck on the surface and fractures are formed in the same pattern.

4 0
3 years ago
a coil has n turns enclosing an area of a. in a physics laboratory experiment, the coil is rotated during the time interval δt f
Mrac [35]
The correct answer for the question that is being presented above is this one:

Phi = BAsin(theta) 
<span>1. Phi(i) = BA </span>
<span>2. Phi(f) = 0 </span>
3. EMF = N(phi(i)-phi(f))/deltat

Here are the follow-up questions:

<span>1. What is the total magnitude Phi_initial of the magnetic flux through the coil before it is rotated? </span>
<span>2. What is the magnitude Phi_final of the total magnetic flux through the coil after it is rotated? </span>
<span>3. What is the magnitude of the average emf induced in the coil?</span>
8 0
3 years ago
A plastic boat with a 25 cm² square cross section floats in a liquid. One by one, you place 50-g masses inside the boat and meas
Crank

Answer:

Explanation:

Archimedes principle states that the upward buoyant foce exrted on a body is equal to th wight o the liquid displaced.

Now, the buoyant force on the boat is given by:

(m+m_b)g=V\rho g

V is the volum \rho is the density m_b is the mass of the boat and m is the mass added to the boat.

(m+m_b)g=(Sd)\rho

S is the surface area and d is the depth.

m=Sd\rho - m_b...(1)

The equation for thebest fit linis,

d=(0.374m/kg)m+0.11m

Re-arrangethis equati for m

m=\frac{d}{(0.374m/kg)}-\frac{0.11m}{0.374m/kg}...(2)

From equations(1) and (2),

Sd\rho=\frac{d}{0.374m/kg}

the density is,

\rho=\frac{1}{S(0.0374m/kg)}=\frac{1}{(25cm^2)(\frac{1m^2}{10^4cm^2})(0.374m/kg)}=1.069\times 10^3 kg/m^3

Therefore, the density of the liquid is

\rho=1.07\times 10^3 kg/m^3

5 0
2 years ago
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