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muminat
3 years ago
9

Suppose that instead of dropping the rock you throw it downwards so that its speed after falling 7 meters is 23.43 m/s. How much

kinetic energy did you give the rock in your throw

Physics
2 answers:
Mkey [24]3 years ago
8 0

Answer:

205.88 ×mass of rock

This problem uses the expression for the kinetic energy of a moving body. K.E = 1/2mv², where m = mass of rock and v = velocity of the rock.

Explanation:

We are requested to calculate the kinetic energy but in order to do sk we must first calculate the initial velocity at which the rock was thrown downwards.

Given the following: h = -7m (thrown downwards and assuming upwards to be positive), v = -23.43 (same reason) and g = 9.8m/s².

The full calculation can be found in the attachment below.

Shkiper50 [21]3 years ago
5 0

Answer:

3,298.1 Hz

Explanation:

Solution is attached

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