Aball is thrown straight up with an initial speed of 16.9 m/s. at what height above its initial position will the ball have one‑half its initial speed?

10.9 m

Explanation:

We can solve the problem by using the law of conservation of energy.

The initial mechanical energy is just the kinetic energy of the ball:

where m is the mass of the ball and u = 16.9 m/s the initial speed.

At a height of h, the total mechanical energy is sum of kinetic energy and gravitational potential energy:

where v is the new speed, g is the gravitational acceleration, h is the height of the ball.

Due to the conservation of energy,

(1)

Here, at a height of h we want the speed to be 1/2 of the initial speed, so

So (1) becomes

So we can find h:

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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