A dog is facing a concave mirror. It is standing closer to the mirror than the focal point. From which location will the reflect
ed dog appear to be sitting?
2 answers:
Answer: Dog must stand outside the focal focal of the concave mirror.
Explanation:
In concave mirror, when ever an object is placed between the focal point and pole the image will be formed behind the mirror larger than the size of the actual object.
When an object is outside the focal point of the mirror then concave mirror will form a real and inverted image smaller than the original size of the object.
So in order to appear to be sitting the dog must stand outside the focal length of the concave mirror.
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Answer:
Equal to change in momentum of larger mass.
Explanation:
We are given that
Two difference masses .
Force act on both masses for the same length of time.
We have to find the change in momentum of the smaller mass.
Let M and m are two masses
M>m
We know that
Change in momentum for large mass=
Change in momentum for small mass=
Because Force and length of time are same for both masses .
Hence, the change in momentum of smaller mass is equal to change in momentum of larger mass.