A object is moving to the right with a speed of when it experiences the force shown in FIGURE EX11.9. What are the object’s speed and direction after the force ends?
The object’s speed and direction after the force ends is to right side.
We need to find that the object’s speed and direction after the force ends.
For a short time a object receives a force is known as impulse. it is the area under the curve of the force-versus-time graph and it is the same as momentum. The impulse is the quantity and it is given by equation in the form
In a graph of force versus time the force is in the range of time . the impulse takes the rectangle shape, where length is and width is . The area of the rectangle is the product of the width and the length
Using equation to get impulse
The object has mass and moves with speed that has momentum , Vector is a product of object's mass and its velocity.The momentum is given by equation in the form
Initial velocity To get initial momentum of the object using equation and putting values for .
The impulse changes its momentum to and it is given by equation in the form
Putting values for in equation to get
To get of the object using equation
The values for putting into equation to get
The direction of the object is right because the velocity is positive.
Two particles collide, one of which was initially moving and the other initially at rest.
a. Is it possible for both particles to be at rest after the collision? Give an example in which this happens, or explain why it can’t happen.
b. Is it possible for one particle to be at rest after the collision? Give an example in which this happens, or explain why it can’t happen.
A 2100 kg truck is traveling east through an intersection at 2.0 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 5.0 m/s. The other is a 1500 kg midsize traveling east at 10 m/s. The three vehicles become entangled and slide as one body. What are their speed and direction just after the collision?
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