Answer:
force is decreased by a factor of 4.
Explanation:
According to the Newton's law of gravitation, the force of gravitation between the two object is inversely proportional to the square of distance between them. Now the distance is doubled, so the force between the two objects becomes one forth.
Force is decreased by a factor or 4.
To solve this exercise it is necessary to apply the equations concerning Work, both by general definition and by conservation of energy.
In other words, the work done by an object due to gravity is the equivalent to that defined by the potential energy equations, that is
Where,
m=mass
g=gravitational acceleration
Change in height
On the other hand we have that the work done by tension is defined by the conservation of kinetic and potential energy, that is to say
Where,
Change in Kinetic Energy
Change in Potential Energy
PART A) As defined by the work done by gravity would be given by,
Therefore the work done by gravity is 25.725kJ
PART B) The work done by the tension applies the energy conservation equation, that is to say
Replacing with our values,
Therefore the work done by tension is 25.9kJ
<span>Electromotive force is the answer.<span>
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Explanation:
Given that,
Average force exerting on the golf club, F = 1000 N
Mass of the ball, m = 0.045 kg
Initial speed of the ball, u = 0
The time of contact between the ball and the club,
1. Let v is the speed of the golf ball as it leaves the tee. The product of force and time is equal to the change in its momentum as :
v = 40 m/s
2. Force applied by the batter, F = 8000 N
Time,
Let J is the magnitude of the impulse delivered to the baseball. It is equal to the product of force and time as :
J = 8.8 kg-m/s