Recent content by Alu

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    What is the diameter of the hole for a flow rate of 4.17x10-5 m3/s?

    Homework Statement A large tank is filled with water and open to the atmosphere has a small hole in its side at a point 15 m below the water level. If the rate of flow from the hole is 4.17x10-5 m 3/s . What is the diameter off the hole (in mm) Homework Equations R=A*V, where R is the rate flow
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    Calculating Kinetic Energy of a Ball at Different Points

    yeah exactly, which leads to: K(b)-K(a)=mgh where h is only 30m(the difference in potential energy). which is equals to 0.04*10*30=12J
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    Calculating Kinetic Energy of a Ball at Different Points

    yeah right, I assumed that K(a)=0 which is not. But at least we can find K(b) which is equals to mgh where h is 30+10 m
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    Calculating Kinetic Energy of a Ball at Different Points

    Homework Statement A 0.04-kg ball is thrown from the top of a 30-m tall building (point A) at an unknown angle above the horizontal. As shown in the figure, the ball attains a maximum height of 10 m above the top of the building before striking the ground at point B. If air resistance is...