A monkey is sitting at the top of a tree 20 m above ground level. A person standing on the ground wants to feed the monkey. He uses a bow and arrow to launch the food to the monkey
If the person knows that the monkey is going to drop from the tree at the same instant that the person launches the food, how should the person aim the arrow containing the food? Air resistance is small enough to be ignored. A) He should aim it at the monkey.
B) He should aim it below the monkey.
C) He should aim it above the monkey.
A
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The force of kinetic friction between two surfaces is independent of the area of contact between the surfaces
Indicate whether the statement is true or false
A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is open and at rest. A small 500-g ball is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side
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What is the focal length of the combined lenses with individual powers of 8.0 diopters and 4.0 diopters?
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