A ball is thrown vertically upward from the surface of earth with a speed of 18kmh^-1
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Explanation:
A ball is thrown vertically upwards from the surface of earth with a speed of 18 km/h. If g= 10, then what is the maximum height attained y the ball?
The initial upward speed u = 18 km per hour = 5 m/s
Speed v at the highest point = 0 m/s
Acceleration due to gravity g = -10 m/s² ( - sign as acceleration is in opposite direction to u)
The maximum height h attained can be ontainef using the relation: v² - u² = 2 g h; ==> 0² - 5² = - 2 × 10 ×h ; or
h = 25/20 = 1.25 m .
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