Over what distance must the lens be movable

Reference no: EM1353874

Q. To focus a camera on objects at different distances, the converging lens is moved toward or away from the image sensor, so a sharp image always falls on the sensor. A camera with a telephoto lens (f = 320 mm) is to be focused on an object located first at a distance of 3.5 m and then at 50.0 m. Over what distance must the lens be movable?

Q. A 25 gram ball is fired with an initial speed v1 toward a 125 gram ball that is hanging motionless from a 1.25 meter string. The balls have a perfectly elastic collision. As a result, the 125 gram ball swings out until the string makes an angle of 37 degrees with the vertical. What was v1?

Reference no: EM1353874

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