Force f=2.0n i - 3.0n k acts on a pebble with position vectorr=0.50m j - 2.0m k relative to the origin. in unit vector notation, what is the resulting torque on the pebble about (a) the origin and(b) the point (2.0m, 0,-3.0m)? a) dot product of f*r=(-3..0m)=6.0nmb) sqrt( 2.0^2+0^2+3.0^2) = sqrt(13)i've tried but not sure. me. you.

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.