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strojnjashka [21]
3 years ago
13

A ball strikes a wall. It exerts a force of 10 N to the left against the wall and bounces off. What force does the wall exert on

the ball?
Physics
2 answers:
Galina-37 [17]3 years ago
6 0
The wall exerts a force of equal magnitude but in the opposite direction. So the force by the wall is 10 N to the right.
elena-s [515]3 years ago
4 0

For this case, when the ball bounces, we can make a free-body diagram in a horizontal direction, obtaining:

-10 + F = 0

Where,

F: force that the wall exerts on the ball.

Clearing the value of F we have:

F = 10 N

Therefore, the wall exerts a force of 10 N on the ball, and the direction of the force is to the right.

Answer:

the wall exerts 10N on the ball to the right

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Two point charges 3q and −8q (with q > 0) are at x = 0 and x = L, respectively, and free to move. A third charge is placed so
riadik2000 [5.3K]

Answer:

Explanation:

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So the unknown charge is somewhere on negative side of x axis . Its charge will be negative . Let it be - Q and let it be at distance - x on x axis.

force on it due to rest of the charges will be equal and opposite so

k3q Q / x² =k 8q Q / (L+x)²

8x² = 3 (L+x)²

2√2 x = √3 (L+x)

2√2 x - √3 x = √3 L

x(2√2 - √3 ) = √3 L

x = √3 L / (2√2 - √3 )

Let us consider the balancing force on 3q

force on it due to -Q and -8q will be equal

kQ . 3q / x² = k3q  8q / L²

Q = 8q  (x² / L²)

so charge required = - 8q  (x² / L²)

and its distance from x on negative x side = √3 L / (2√2 - √3 )

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3 years ago
What is the least force you could exert on the refrigerator to move it?
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 <span>If the refrigerator weights 1365 and you are not exerting any vertical force on it, then the normal force is also 1365N. so Fn=1365 

Fsf = Static frictional force = (coefficient of static friction) * (Normal force) 

So the least for you could exert to move it is equal to the Fsf. 
Fsf = (0.49)(1365N)</span><span>
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use the instantaneous center of zero velocity to determine the angular velocity !ab of link ab and the velocity vb of collar b f
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Instantaneous center:

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From the diagram

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If we take three link link1,link2 and link3 then I center of these three link will be in one straight line It means that they will be co-linear.

Therefore, when the mass is at its equilibrium position (which corresponds to x=0), the velocity of the mass will be maximum.

To know more about velocity, refer: brainly.com/question/12413963

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7 0
1 year ago
The balmer series is formed by electron transitions in hydrogen that
RSB [31]

Answer:

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The wavelength associated to each spectral line of the Balmer series is given by:

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All the following lines lie in the ultraviolet part of the spectrum. The limit of the Balmer series, corresponding to the transition \infty \rightarrow 2, is at 364.6 nm.

4 0
3 years ago
A 2.00-gram air inflated balloon is given an excess negative charge, q1 = -3.25 × 10-8 C, by rubbing it with a blanket. It is fo
Llana [10]

Answer:

The rod`s charge must be positive,  because the gravity force is pointing downwards and the electrostatic force must be pointing upwards (in order to balance the gravity force)

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Explanation:

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please see the file attached for more details.

Download pdf
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