Answer:
5437.5 N
Explanation:
from the question we are given the following:
mass = 7.25 kg
initial speed (u) = 10.5 
finial velocity (v) = 0
compression (s) = -7.35 cm = -0.0735 m (the negative sign is because the face is compressed, so there is a decrease)
we know that force = mass x acceleration,
we have our mass but need to find the acceleration. we can get the acceleration by applying the formula below
therefore
0 = 10.5^{2} + (-2)× a × 0.0735[/tex]
a = 
}[/tex]
a = 750
from F = m x a
force = 7.25 x 750 = 5437.5 N
As we know that block of steel is continue to be in moving state
so here the friction must be kinetic friction between two surface
so we know that formula of kinetic friction must be
now we have
now from the above equation we have
So here we need atleast 14.25 N force to continue sliding the box now as per given options all forces which are less than 14.25 N is not correct
Hence correct answer must be 18.0 N
<u>D) 18.0 N</u>
Answer:
Accelerates in the same direction as the field
Explanation:
When a charge is immersed in an electric field, the charge experiences an electric force, whose magnitude is given by
F = qE
where q is the magnitude of the charge and E is the magnitude of the electric field.
The direction of the force depends on the sign of the charge. In particular,
- For a positive charge, F and E have the same direction
- For a negative charge, F and E have opposite directions
Therefore, a free positive charge will experience a force in the same direction as the field - therefore, it will accelerate in the same direction.
The most important thing you should remember in order to get how is its linear momentum relative to the surface is that the<span> point on the circumference is moving at w rad/second.
Therefore, here is the solving formulae:
if </span>
you can easily get <span> linear momentum p :
</span>
I'm sure that helps.
