Physics, 03.02.2021 06:00 kait93

Sunscreen is used to protect skin from infrared rays. true or false Light-reflecting from a wool sweater is an example of diffuse reflection.
true or false

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Physics, 22.06.2019 03:30, natu2072

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

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Physics, 22.06.2019 19:00, sanchez626

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Physics, 22.06.2019 19:30, paulstanley972

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

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Sunscreen is used to protect skin from infrared rays. true or false Light-reflecting from a wool sw...