A 600 kg elevator initially moving upward undergoes motion represented by the velocity vs time graph shown. Calculate the force of tension supporting the
elevator. (Enter your answer as four significant figures without units or spaces.
Ex) If the force=1598.3 N enter "1598") *
velocity
(m/s)
7
6
ET
5
4
3
2
1
time
(5)
0
1
2
3
4
5
6
7

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by