GEOG 216 Lecture 14: lecture 14

Force F = (4.0 N)i + (-3.0 N)k acts on a pebble with positionvector r = (0.40 m)j + (-0.8k m)k , relative to the origin. What isthe resulting torque acting on the pebble about a point withcoordinates (-8.0 m, 8.0 m, -2.0 m)? Answer as a vector. I know τ =r - r₁ x F.

Force vec F = -10 hat j N is exerted on a particle at vec r = (4hat i + 5 hat j) m

Tx, Ty, Tz in N*m...?

A worker pushing a 35.0-kg wooden crate at a constant speed for10.7 m along a wood floor does 410 J of work by applying a constanthorizontal force of magnitude F on the crate.
(a) Determine the value of F. _____ N