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2 answers:
Answer:
c. Yes, because electric charges have electric fields surrounding them that allow them to exert forces on other objects without touching them.
Explanation:
As we know by Coulomb's law the force of attraction or force of repulsion between two charged bodies is given by
now we know that
if two charges are of same sign then they will repel each other and if the two charges are of opposite sign then they must attract each other.
So here since two balloons are of negative charge so we can say that electric field on one balloon will repel the charge of other balloon.
So here both balloons will repel each other and correct answer will be
c. Yes, because electric charges have electric fields surrounding them that allow them to exert forces on other objects without touching them.
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Answer:
250 N
433 N
Explanation:
N = Normal force by the surface of the inclined plane
W = Weight of the block = 500 N
f = static frictional force acting on the block
Parallel to incline, force equation is given as
f = W Sin30
f = (500) Sin30
f = 250 N
Perpendicular to incline force equation is given
N = W Cos30
N = (500) Cos30
N = 433 N
Answer:
Both objects have the same magnitude of momentum.
Explanation:
If an object of mass is moving at a velocity of
, the momentum of that object would be
.
The (
) object is moving at a speed of
. The magnitude of the momentum of this object would be
.
Similarly, the momentum of the (
) object moving at a speed of
would be
.
Hence, the magnitude of momentum is the same for the two objects.
In this problem we have the electric field intensity E:
E = 6.5 × newtons/coulomb
We have the magnitude of the load:
q = 6.4 × coulombs
We also have the distance d that the load moved in a direction parallel to the field 1.2 × meters.
We know that the electric potential energy (PE) is:
PE = qEd
So:
PE = (6.4 × )(6.5 ×
)(1.2 ×
)
PE = 5.0 x joules
None of the options shown is correct.