(a)
The appropriate version of the equation
(a)

Answer to Problem 1P
The appropriate version of equation
Explanation of Solution
A ball of mass
From the conservation of energy, the total energy of an isolated system remains conserved. It means if kinetic energy increases then the potential energy decreases.
The appropriate version of the equation
Here,
As the system is under free fall therefore initial velocity of the ball is zero and its final potential energy will also be zero.
Write the formula to calculate the velocity of the ball just before strike the earth by energy of conservation
Here,
Write the formula to calculate final kinetic energy of the ball
Here,
The initial kinetic energy of the ball is zero.
Write the formula to calculate initial potential energy
Here,
Substitute
Conclusion:
Therefore, the appropriate equation
(b)
The appropriate version of the equation
(b)

Answer to Problem 1P
The appropriate version of equation
Explanation of Solution
A ball of mass
From the conservation of energy, the total energy of an isolated system remains conserved. It means if kinetic energy increases then the potential energy decreases.
The appropriate version of the equation
Here,
As the system is under free fall therefore initial velocity of the ball is zero and its final potential energy will also be zero.
Rewrite the above equation
Write the formula to calculate initial potential energy
Here,
Substitute
Conclusion:
Therefore, the appropriate equation
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Chapter 8 Solutions
PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
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