ABP StudeT
09-21-2008, 03:25 PM
Baal starts from rest and acceleration at 0.500m/s^2
While moving down an inclined plane9.00m long. When it reaches the bottom the ball rolls up another plane, where it comes to rest after moving 15m on that plane.
1-what speed of the ball at the bottom of the first plane?
2-During what time interval does the ball roll down the first plane?
3-what is the acceleration along the second plane?
4-what is the ball’s speed 8m along the second plane?
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A test rocket is fired vertically upward from a well
A catapult gives it initial speed 80m/s at ground level
Its engines then fire and it acceleration upward at4m/s^2 until it reaches an altitude of 1000m
At that point its engines fail and the rocket goes into free-fall with an acceleration of-9.8m/s^2
1- How long is the rocket in motion above the ground?
2-What is its Maximum altitude?
3-what is its velocity just before it collides with the Earth?
(You will need to consider the motion while the engine is operating separately from the free fall motion
=================================== ============
A rocket is dropped from rest into a well
1-The sound of the splash is heard 2.4s after the rock is released from rest. How far below the top of the well is the surface of the water>
the speed of sound in air(at the ambient temperature)is336m/s
2-if the travel time for the sound is ignored
what percentage error is introduced when the depth of the well is calculated
While moving down an inclined plane9.00m long. When it reaches the bottom the ball rolls up another plane, where it comes to rest after moving 15m on that plane.
1-what speed of the ball at the bottom of the first plane?
2-During what time interval does the ball roll down the first plane?
3-what is the acceleration along the second plane?
4-what is the ball’s speed 8m along the second plane?
=================================== ===============
A test rocket is fired vertically upward from a well
A catapult gives it initial speed 80m/s at ground level
Its engines then fire and it acceleration upward at4m/s^2 until it reaches an altitude of 1000m
At that point its engines fail and the rocket goes into free-fall with an acceleration of-9.8m/s^2
1- How long is the rocket in motion above the ground?
2-What is its Maximum altitude?
3-what is its velocity just before it collides with the Earth?
(You will need to consider the motion while the engine is operating separately from the free fall motion
=================================== ============
A rocket is dropped from rest into a well
1-The sound of the splash is heard 2.4s after the rock is released from rest. How far below the top of the well is the surface of the water>
the speed of sound in air(at the ambient temperature)is336m/s
2-if the travel time for the sound is ignored
what percentage error is introduced when the depth of the well is calculated