An object is placed 25 cm from a convex lens whose focal length is 10 cm. The image distance is ________ cm.
1 answer:
16.67cm
Explanation:
Given parameters:
Object distance, U = 25cm (u is -25cm for convex lens)
Focal length = 10cm
Unknown parameter:
Image distance, V = ?
Solution
To solve for the image distance, we use the equation:
Images in a convex mirrors are real, inverted, smaller than the object
=
-
=
-
image distance = 16.67cm
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Given:
mass: 100 kg
height: 500 m
1 kJ = 1000 J
gravity = 9.8 m/s²
velocity before impact: v = √2gh ; v = √2 * 9.8 m/s² * 500 m ; v = 98.99494 m/s
KE = 1/2 m v²
KE = 1/2 * 100 kg * (98.99494 m/s)²
KE = 490,000 J
Pls. see attachment.
mass: 100 kg
height: 500 m
1 kJ = 1000 J
gravity = 9.8 m/s²
velocity before impact: v = √2gh ; v = √2 * 9.8 m/s² * 500 m ; v = 98.99494 m/s
KE = 1/2 m v²
KE = 1/2 * 100 kg * (98.99494 m/s)²
KE = 490,000 J
Pls. see attachment.