You use a pulley system to lift a fallen tree . you apply a force of 50 n and the pulley pulls on the tree with a force of 1300 n what is the mechanical advantage of the pulley ?

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?