A 47.0-g golf ball is driven from the tee with an initial speed of 54.0 m/s and rises to a height of 24.6 m. (a) neglect air res
1 answer:
We can solve the problem by using the law of conservation of energy.
At the starting point, the ball has only kinetic energy, since its height is zero, so:
At its highest point, the ball has both potential energy and kinetic energy:
we can find the potential energy of the ball at its highest point:
For the law of conservation of energy, the initial mechanical energy should be equal to the final mechanical energy:
which becomes
that we can solve to find the kinetic energy of the ball at its highest point:
At the starting point, the ball has only kinetic energy, since its height is zero, so:
At its highest point, the ball has both potential energy and kinetic energy:
we can find the potential energy of the ball at its highest point:
For the law of conservation of energy, the initial mechanical energy should be equal to the final mechanical energy:
which becomes
that we can solve to find the kinetic energy of the ball at its highest point:
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Answer:
a) 3.74 circumference of earth
b)1.67× 10⁻⁸ sec
Explanation:
a) given,
time = 0.5 second
distance = speed × time
= 3 x 10⁸ × 0.5
= 1.5 × 10⁸ m
circumference of earth = 40075 km
= 4.01 × 10⁷m
distance with respect to circumference=
= 3.74 circumference of earth
b) distance = 5 m
time =
=
= 1.67× 10⁻⁸ sec