Answer:
2114 newtons
Explanation:
Assuming the tension in the cable constant, the deacceleration of the elevator is constant too. So, we can use the Galileo's kinematic equation:
With v the final velocity that is zero because is the velocity when the elevator stops, vo the initial velocity that is the velocity the elevator is allowed to reach, a the acceleration and Δx the distance the elevator takes to stop. Solving for a:
Now with the acceleration we can use Newton's second law to find the force (the tension) on the cable:
with F=T the tension, and m the mass of the elevator including occupants, solving for T
Answer:
1) Potential energy (gravitation)
2)Potential energy
3)Kinetic energy
4) Kinetic energy
5)Potential energy
6)Kinectic energy
7)Potential energy (elastic)
Hope it helps
I really think it could be a 23 kg
Answer:
The alkaline earth metals (beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. somewhat reactive metals at standard temperature and pressure.
Solution: A. Ocean currents.
The hypothesis of Continental drift suggests that in past, there was only one landmass on the Earth -Pangaea which drifted apart due to movement of plate tectonics causing earthquake. This hypothesis is supported by many evidences which includes presence of similar fossils on different landmasses, common land features such as widespread presence of glacial sediments and the ocean currents. As the landmass drifted apart, the ocean crust rose up causing the change in the ocean currents.