Question

A ball is thrown vertically upward from the surface of earth with a speed of 18kmh^-1​

Answer 1

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 .