(1) (2) (3) (4) A bicycle pedal is pushed straight downwards by a foot with a 26

Question

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A bicycle pedal is pushed straight downwards by a foot with a 26 Newton force. The shaft of the pedal is 20 cm long. If the shaft is pi /3 radians past horizontal, what is the magnitude of the torque about the point where the shaft is attached to the bicycle? Nm Let a = and b = be vectors. Compute the cross product a times b. a times b = The figure below shows a vector a in the x-y plane with |a| = 10 and a vector b with |b| = 5 which points in the direction of k. The magnitude |a times b| = Use the right hand rule to determine whether the components of a times b are positive (P), negative (N) or zero, (0). The first component of a times b is The second component of a times b is The third component of a times b is The figure below shows a vector u with |u| = 2 and a vector v with |v| = 6. The magnitude |u times v| = Use the right hand rule to determine whether u times v points into the page (I) or out of the page (O). .(Use I or O)

Explanation / Answer

1) 0

2)axb= (-6,42,-16)

3) 1st component is positive

2nd component is negative

3rd component is zero

4)|uxv| =|u||v|sin150 = 2*6/2 =6

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