Physics, 10.11.2020 23:20 babysisjessica1

A cliff diver running 3.60 m/s dives out horizontally from the edge of a vertical cliff and reaches the water below 2.00 s later. How high is the cliff and how far from the base of the cliff did the diver hit the water?
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Answer from: dominaricann2451

The height of the cliff is 19.6m and the base of the cliff did the diver hit the water is 7.2m

The distance at the base of the cliff did that the diver hit the water is the horizontal distance. This is expressed as:

$distance=speed \times time$

d_x = vt

Given the following parameters

Speed v = 3.60m/s

Time t = 2.0s

Substitute into the formula to have:

$d_x = 3.6 \times 2\\d_x = 7.2m$

The height of the cliff will be the vertical height derived according to the Newton's law of motion:

$h_y=ut+\frac{1}{2}gt^2\\h_y=0(t) + \frac{1}{2}gt^2\\h_y= \frac{1}{2}(9.8)(2)^2\\h_y=4.9(4)\\h_y=19.6m$

Hence the height of the cliff is 19.6m

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Answer from: humblemalak

Explanation:

It is given that,

The horizontal speed of a cliff diver, $v_x=3.6\ m/s$

It reaches the water below 2.00 s later, t = 2 s

Let d_x is the distance where the diver hit the water. It can be calculated as follows :

$d_x=v_x\times t\\\\=3.6\times 2\\\\=7.2\ m$

Let d_y is the height of the cliff. It can be calculated using second equation of motion as follows :

$d_y=u_yt+\dfrac{1}{2}gt^2\\\\d_y=\dfrac{1}{2}\times 9.8\times 2^2\\\\=19.6\ m$

So, the cliff is 19.6 m high and it will hit the water at a distance of 19.6 m.

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Answer from: Quest

Look it up you feel me

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