A ball is thrown upward at an angle with a speed and direction such that it reaches a maximum height of 19.5 m above the point it was released, with no appreciable air resistance. At its maximum height it has a speed of 18.5 m/s. With what speed was the ball released?a. 26.9 m/sb. 32.3 m/sc. 37.7 m/sd. 16.2 m/se. 21.5 m/s

a. 26.9 m/s

Explanation:

Parameters given:

Height reached by ball, s = 19.5 m

Speed at maximum height (final velocity), v = 18.5 m/s

To find the initial speed of the ball, we use one of Newton's equations of motion:

where g = acceleration due to gravity

The negative sign is present because the ball is thrown upward, hence, it moves against the gravitational force.

Therefore:

The ball was released at a speed of 26.9 m/s.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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