Example 3 An astronomical telescope has lenses of focal lengths, 100 cm and 10 cm
respectively, and is used for viewing an object 4 m from the objective. If the
final image is formed 25 cm from the eye placed close to the eye-piece, calculate
the distance between the lenses.
Solution

Which accurately compares concave and convex lenses?

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.