Two crates, A and B, sit at rest side by side on a frictionless horizontal surface. The crates have masses mA and mB. A horizont
al force F is applied to crate A and the two crates move off to the right. Draw the free-body diagram for crates A and B.
I have tried <--|----->; <--|-->; <-----|--> to no avail, they are all incorrect. Normal force up is equal to weight (gravity) force down so sum of vertical forces F = 0N. I know I am doing something wrong but cannot figure out what and the system does not point me in the write direction with each incorrect response.
I have tried <--|----->; <--|-->; <-----|--> to no avail, they are all incorrect. Normal force up is equal to weight (gravity) force down so sum of vertical forces F = 0N. I know I am doing something wrong but cannot figure out what and the system does not point me in the write direction with each incorrect response.
1 answer:
Answer:
Here's what I get
Explanation:
The free-body diagram for Crate A has a vertical gravitational force Wa downward and a vertical normal force Na from the frictionless surface upward.
It also has the horizontal applied force F to the right and a horizontal force from Crate B to the left.
The diagram for Crate B has a vertical gravitational force Wb downward and a vertical normal force Nb upward. It also has the horizontal force from Crate A to the right,
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Answer:
mass consumed by 235U each day = 2 kg
Explanation:
electrical power produced = 1 GW = 1 × 10⁹ × (6.24151 × 10¹⁸ ) eV
= 6.24151× 10²¹ MeV/s
thermal energy = 0.420 * 250 = 105 MeV
= 5.94 × 10¹⁹ fission/second
=5.94 × 10¹⁹× 24 × 60 ×60)
= 5.13 × 10²⁴ fission/day
mu = 235.04393 × 1.660× 10 ⁻²⁷ = 390.1729× 10⁻²⁷ Kg
M = mu ×5.13 × 10²⁴
= 390.1729× 10⁻²⁷ ×5.13 × 10²⁴
M = 2 kg(approx.)
mass consumed by 235U each day = 2 kg