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Math and Physics Whizzes!

[From: ] [author: ] [Date: 11-05-10] [Hit: ]
4. Humpty Dumpty sat on a wall.The velocity with which Humpty must hit the ground in order that he can not be put back together again is 40 m/s.What is the maximum safe height of the wall?5. You throw an orange straight up into the air.......
These questions should be easy for a lot of you but i need help!!! I have work soon and i dont get home til late so my dad can't help me! :( Please help with these questions!!

4. Humpty Dumpty sat on a wall. The velocity with which Humpty must hit the ground in order that he can not be put back together again is 40 m/s. What is the maximum safe height of the wall?

5. You throw an orange straight up into the air. When you release the orange it is 1.5 m above the ground. The orange reaches a maximum height of 21.1 m. With what velocity did you release the orange?

6. Solve the following system for k, w and n.
k + w + n = 4
k – 2w – n = 1
2k – w – 2n = -1

7. A plate slides across a table at 6 m/s. The plate lands 3 m away (horizontally) from the edge of the table. How high is the table? How long was the plate airborne?

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These questions should be easy for a lot of you but i need help!!! I have work soon and i dont get home til late so my dad can't help me! :( Please help with these questions!!

Below are 5 motion equations.
Read the problem and determine what variable each number represents!

Distance = Initial velocity * time + ½ * acceleration * time^2
Final velocity – Initial velocity = acceleration * time
Distance = Average velocity * time
Average velocity = ½ * (Final velocity + Initial velocity)
Final velocity^2 – Initial velocity^2 = 2 * acceleration * displacement

As an object falls, its velocity increases 9.8 m/s each second.
As an object moves upward, its velocity decreases 9.8 m/s each second.


4. Humpty Dumpty sat on a wall. The velocity with which Humpty must hit the ground in order that he can not be put back together again is 40 m/s. What is the maximum safe height of the wall?


As an object falls, its velocity increases 9.8 m/s each second.
Final velocity = Initial velocity + 9.8 * time
40 = 0 + 9.8 * time
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