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madreJ [45]
2 years ago
8

How fast is a ball going when it hits the ground after being dropped from a

Physics
1 answer:
Umnica [9.8K]2 years ago
3 0

Answer:

Option D.

Explanation:

Data:

  • Height (h) = 9 m
  • Gravity (g) = 9.8 m/s²
  • Velocity Final (Vf) = ?

Use formula:

  • Vf² = 2 * g * h

Replace:

  • Vf² = 2 * 9.8 m/s² * 9 m

Multiply gravity with height:

  • Vf² = 2 * 88.2

Multiply:

  • Vf² = 176.4

Solve the square root:

  • Vf = 13.3

How fast is the ball going?

The speed is going at a speed of <u>13.3 meters per second.</u>

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Answer:

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2 years ago
A rod 7.0 m long is pivoted at a point 2.0 m from the left end. A downward force of 50 N acts at the left end, and a downward fo
kicyunya [14]

If the rod is in rotational equilibrium, then the net torques acting on it is zero:

∑ τ = 0

Let's give the system a counterclockwise orientation, so that forces that would cause the rod to rotate counterclockwise act in the positive direction. Compute the magnitudes of each torque:

• at the left end,

τ = + (50 N) (2.0 m) = 100 N•m

• at the right end,

τ = - (200 N) (5.0 m) = - 1000 N•m

• at a point a distance d to the right of the pivot point,

τ = + (300 N) d

Then

∑ τ = 100 N•m - 1000 N•m + (300 N) d = 0

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6 0
2 years ago
Between a plate and the body of a bolt, the projected area is equal to the product of the bolt _______ and the plate _______.
Elan Coil [88]

Answer:

Projected area= Diameter of the bolt* thickness.

Explanation:

Between a plate and the body of a bolt, the projected area is equal to the product of the bolt _Diameter of the bolt______ and the plate ___thickness____.

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IS
jarptica [38.1K]

Answer:

5.03

Explanation:

trust me

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