A squirrel, a train, a bird, and a car are all traveling at the same velocity. Which object has the greatest amount of kinetic e
2 answers:
Explanation:
Kinetic energy is the energy acquired due to the motion of an object.
Mathematically, kinetic energy =
where m = mass
v = velocity
Therefore, kinetic energy depends on the mass and square of velocity. Hence, more is the mass of an object more will be its velocity.
Thus, we can conclude that out of the given options, train will have more mass as compared to other objects, therefore, train will have highest kinetic energy.
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Answer:twice of initial value
Explanation:
Given
spring compresses distance for some initial speed
Suppose v is the initial speed and k be the spring constant
Applying conservation of energy
kinetic energy converted into spring Elastic potential energy
When speed doubles
divide 1 and 2
Therefore spring compresses twice the initial value
A) See ray diagram in attachment (-6.0 cm)
By looking at the ray diagram, we see that the image is located approximately at a distance of 6-7 cm from the lens. This can be confirmed by using the lens equation:
where
q is the distance of the image from the lens
f = -10 cm is the focal length (negative for a diverging lens)
p = 15 cm is the distance of the object from the lens
Solving for q,
B) The image is upright
As we see from the ray diagram, the image is upright. This is also confirmed by the magnification equation:
where are the size of the image and of the object, respectively.
Since q < 0 and p > o, we have that , which means that the image is upright.
C) The image is virtual
As we see from the ray diagram, the image is on the same side of the object with respect to the lens: so, it is virtual.
This is also confirmed by the sign of q in the lens equation: since q < 0, it means that the image is virtual
