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1. ### free fall motion question

Take downwards as +VE. The above calculations consider the downwards journey where the boy returns...

2. ### physics---electricity2

Consider a radius R that is at an angle a above the horizotnal axis through P The small arc on the semi-circle subtebded by...

3. ### Physics starship

Let h be the height of the table above the floor, and v be the projecting speed of the ball. On earth: ...

4. ### f.4 physics!

...right angle triangle is oriented with side AB vertical with A above B, BC is the base (horizontal). Under the orientation ...

5. ### physics vt-graph問題 (20點)

... taken into account. 2. In the tradiational convention, areas above the time axis (i.e. +ve displacement) indicates displacement towards the left, whereas...

6. ### PHY ===MC (SHOW YOUR WORK)

...conservation of momentum initial momentum = mu final momentum = mv1+2mv2 u = v1 +2v2 using above forumla, eliminating ans A conservation of kinetic energy: final energy...

7. ### 物理高手..幫幫忙

The pressure given by the trapped air above the mercury column in the barometer = (750 - 740) mmHg = 10 mmHg ...

8. ### 物理PHY

...s⁻² Take downward quantities as positive. Let h m above the ground be the height of the balls meet in air. Ball ...