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torisob [31]
2 years ago
11

Calculate the kinetic energy of a 2kg ball moving at 5m/s

Physics
1 answer:
shepuryov [24]2 years ago
8 0

Answer:

25

Explanation:

The kinetic energy is 25

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What three factors decide how much gravitational potential energy a body has?
nikdorinn [45]

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3. Gravitational Force Field

Explanation:

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3 years ago
A 90.0-kg mail bag hangs by a vertical rope 3.5 m long. A postal worker then displaces the bag to a position 2.0 m sideways from
asambeis [7]

Answer:

615 N

Explanation:

If θ is the angle from vertical and T is the rope tension

θ = arcsin (2.0 / 3.5) = 34.85°

Summing vertical forces to zero

Tcosθ - mg = 0

T = 90.0(9.81) / cos34.85 = 1,075.85 N

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F = 1075.85sin34.85 = 1075.85(2.0/3.5) = 614.772... ≈ 615 N

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2 years ago
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