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Page 67

CTIONS OF WHICH FORM ANY

which presents itself, is that where the

forces is a right

perpendicular to ...

CTIONS OF WHICH FORM ANY

**ANGLE**WITH EACH OTHER. The first casewhich presents itself, is that where the

**angle**formed by the directions of theforces is a right

**angle**. Let then the direction of the two forces P, Q, beperpendicular to ...

Page 68

Put a for the

OE = AO x cot. a, and OF = A O x tan a ; we have then P2 tan. a , - _ , — = — tan a

: from whence r — (J, X tan. a U cot. a These equations serve to determine the ...

Put a for the

**angle**O A F; then, the right angled triangles A O E, and A O F, giveOE = AO x cot. a, and OF = A O x tan a ; we have then P2 tan. a , - _ , — = — tan a

: from whence r — (J, X tan. a U cot. a These equations serve to determine the ...

Page 210

In the annexed figure let BC be the beam, A the middle point ; then, because the

ball is perfectly elastic, the

reflection ; that is, in this case t. BAF=z.EAC = |ofa right

iWCA ...

In the annexed figure let BC be the beam, A the middle point ; then, because the

ball is perfectly elastic, the

**angle**of incidence will be equal to the**angle**ofreflection ; that is, in this case t. BAF=z.EAC = |ofa right

**angle**= 60° = WBC, andiWCA ...

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