Lucy boards a crowded bus as it sits in the station. there are no available seats, so lucy stands in the center aisle next to a support pole. as the bus starts moving forward and picks up speed, lucy holds the pole tightly to avoid falling over backward. while the bus is speeding up, what is the direction of the total force (if any) on lucy? a. is it forward b. baclwards c. the total force is zero?

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f