Stacy measures two quantities: the mass of each washer and the force that the washers exert on the force meter. In general, how
1 answer:
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In collision type of problems since momentum is always conserved
we can say
So here along with this equation we also required one more equation for the restitution coefficient
so above two equations are required to find the velocity after collision
here the change in velocity occurs due to the contact force while they contact in each other
so this is the impulse of collision while they are in contact with each other while in collision which changes the velocity of two colliding objects
a) Magnitude of the electric force:
b) Tension in the string: 0.010 N
Explanation:
a)
When the charged rod is brought near the ball, then the ball remains "suspended" in an inclined position. Therefore, we can analzye the forces acting in two perpendicular directions:
- Along the horizontal direction, we have the electric force , pushing in one direction, and the component of the tension in the string acting in the opposite direction,
, where T is the tension and
is the angle with the vertical
- Along the vertical direction, we have the weight of the ball, , acting downward (where
is the mass of the ball and
is the acceleration due to gravity), and the component of the tension acting in the upward direction,
Therefore, since the ball is in equilibrium, we have the two equations:
By dividing the two equations, we get
an solving for the electric force, we find
b)
The tension in the string can now be found by using either of the two equations above; for instance, by using the equation along the horizontal direction,
Where
is the electric force
is the angle with the vertical
We find the tension in the string:
Learn more about electric force:
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Answer:
$ 18.75
Explanation:
given,
capacity of the Dave’s car = 12 gallons
Assuming that the tank is 3/8 full before
Cost of gas per gallon = $2.50 per gallon of gas
Volume Dave have to fill
=
= of full tank
=
volume Dave have to fill = 7.5 gallons
total money Dave spent
= 7.5 gallons x $2.50
= $ 18.75
Dave have to spend $ 18.75 to fill tank to it capacity.