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The owner of a van installs a rear-window lens that has a focal length of -0.302 meter. When the owner looks out through the lens at a person standing directly behind the van, the person appears to be just 0.235 meter from the back of the van, and appears to be 0.341 meter tall.
(a) Compute how far from the van is the person truly standing?
m
(b) Evaluate how tall is the person?
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A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest. The bullet emerges from the block with speed of 400 m/s. a.) How much energy was lost in the collision? b.) Calculate the average force exerted on the block as..
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To measure the speed of a bullet, the following situation is setup. A wooden block(m=0.50kg) is put on top of a fencepostwith a height of 1.5m. The bullet (m=.010kg) strikes theblock from a perfectly horizontal direction and remains embedded init. Th..
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