- #1
thschica
- 47
- 0
Im having trouble with a few problems.
1.A kangaroo jumps to a vertical height of 2.5 m. How long was it in the air before returning to Earth?
? s ( On this problem I keep getting a negative number.I know that this on is wrong for sure. What equation should I be using?)
3. A helicopter is ascending vertically with a speed of 6.00 m/s. At a height of 170 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
?s ( I have tried three equations but I still can figure out exactly which one I should be using)
10. A stone is thrown vertically upward with a speed of 13.0 m/s from the edge of a cliff 72.0 m high
(a) How much later does it reach the bottom of the cliff?
? s
(b) What is its speed just before hitting?
?m/s
(c) What total distance did it travel?
?m
(Once again I am getting negatives!)
25. A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 6.6 s later. If the speed of sound is 340 m/s, how high is the cliff?
? m (This one I am not sure what I am doing wrong)
1.A kangaroo jumps to a vertical height of 2.5 m. How long was it in the air before returning to Earth?
? s ( On this problem I keep getting a negative number.I know that this on is wrong for sure. What equation should I be using?)
3. A helicopter is ascending vertically with a speed of 6.00 m/s. At a height of 170 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
?s ( I have tried three equations but I still can figure out exactly which one I should be using)
10. A stone is thrown vertically upward with a speed of 13.0 m/s from the edge of a cliff 72.0 m high
(a) How much later does it reach the bottom of the cliff?
? s
(b) What is its speed just before hitting?
?m/s
(c) What total distance did it travel?
?m
(Once again I am getting negatives!)
25. A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 6.6 s later. If the speed of sound is 340 m/s, how high is the cliff?
? m (This one I am not sure what I am doing wrong)
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