A baseball with a mass of 0.15 kilograms collides with a bat at a speed of 40 meters/second. The duration of the collision is 8.
1 answer:
Answer: 1687.5 N
Explanation:
From the second law of motion given by Newton, Force is the rate change of momentum.
Mass of the baseball, m = 0.15 kg
Initial velocity, (negative because direction of initial velocity is opposite to the final velocity)
Final velocity,
The duration of collision,
Force,
Hence, the value of force is 1687.5 N.
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Complete Question
The two isolated parallel plate capacitors be- low, one with plate separation d and the other with D > d, have the same plate area A and
are given the same charge Q.
What is the energy in the spark produced by discharging the second capacitor?
1. The same as the discharge spark of the first capacitor
2. More energetic than the discharge spark of the first capacitor
3. Less energetic than the discharge spark of the first capacitor
Answer:
The correct option is 2
Explanation:
The formula for the energy stored in the capacitor is
And generally the formula for finding the capacitance of a capacitor is
We can denote the capacitance of the first capacitor as
and denote the capacitance of the second capacitor as
Looking at this formula we can see that C varies inversely with d
as D > d it means that
Since the charge is constant
i.e U varies inversely with C
So =>
This means that the energy of spark would be more for capacitor two compared to capacitor one
The correct option is 2