How Do Physics Principles Determine the Outcome in Log and Elevator Scenarios?

[eureka360]

hi guys.. can i ask you about this problem?
A log is floating on swiftly moving water. A stone is dropped from rest from a 75meter high bridge and lands on the log as it passes under the bridge. If the log moves with a constant speed of 5 meters per second, what is the horizontal distance between the log and the bridge when the stone is released?

 

[eureka360]

A cable lifts a 1200kilogram elevator at a constant velocity for a distance of 35 meters. What is the work done by:
a.) the tension in the cable
b.)the elevators weight?

 

[Astronuc]

hi guys.. can i ask you about this problem?
A log is floating on swiftly moving water. A stone is dropped from rest from a 75meter high bridge and lands on the log as it passes under the bridge. If the log moves with a constant speed of 5 meters per second, what is the horizontal distance between the log and the bridge when the stone is released?

A cable lifts a 1200kilogram elevator at a constant velocity for a distance of 35 meters. What is the work done by:
a.) the tension in the cable
b.)the elevators weight?

Please post homework problems in the appropriate homework sections, e.g. Introductory Physics.

Weight is nothing more than m*g, where m is mass and g is acceleration due to gravity. Work is the integral of force over distance, or simply product of force * distance, if force is constant over the distance.