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Klio2033 [76]
3 years ago
14

A golf ball strikes a hard, smooth floor at an angle of 39.8 ° and, as the drawing shows, rebounds at the same angle. The mass o

f the ball is 0.0285 kg, and its speed is 30.4 m/s just before and after striking the floor. What is the magnitude of the impulse applied to the golf ball by the floor? (Hint: Note that only the vertical component of the ball's momentum changes during impact with the floor, and ignore the weight of the ball.)
Physics
2 answers:
galben [10]3 years ago
8 0

Answer:

   I = 1.1 N s

Explanation:

The momentum is equal to the change of the moment

       I = Δp = m v_{f}-m v₀

They indicate that the ball arrived at an angle of 39.8º, let's use trigonometry to find the velocity component

      sin 39.8 = v_{y} / v

      cos39.8º = vₓ / v

      v_{y} = V sin 39.8

      v_{y} = 30.4 sin39.4

      v_{y} = 19.3 m / s

Let's calculate the momentum on the y axis

      I =  m  v_{oy} - m v_{fy}

      I = 0.0285 19.3 - 0.285 (-19.3)  

      I = 1.1 N s

tangare [24]3 years ago
7 0

Answer:

The magnitude of the impulse is 1.33 kg m/s

Explanation:

please look at the solution in the attached Word file

Download docx
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If the force of gravity changes what will happen and what would cause it to change?
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3 years ago
What is the magnitude of the torque that the axle must apply to prevent the disk from rotating?
mihalych1998 [28]

The required torque at the axle, is given by the difference between the

moments of the applied forces.

The torque required is <u>19.62 N·m counterclockwise</u>

Reasons:

The given parameters are;

Mass of the disk, m = 5.0 kg

Location of the axle = Half the radius of the disk

Diameter of the disk, D = 40 cm = 0.4 m

Applied mass, 0.1 m from the axle = 15 kg

Applied mass, 0.3 m from the axle = 10 kg

Required:

Magnitude of torque at the axle that prevent the disk from rotating

Solution:

Torque needed = Clockwise moment - Counterclockwise moment

Clockwise moment = (10 kg × 0.3 m + 5 kg × 0.1 m) × 9.81 m/s² = 34.335 N·m

Counterclockwise moment = 15 kg × 0.1 m  × 9.81 m/s² = 14.715 N·m

τ + Counterclockwise moment = Clockwise moment

τ + 14.715 N·m = 34.335 N·m

Torque required, τ = 34.335 N·m - 14.715 N·m = 19.62 N·m

Torque required, τ = <u>19.62 N·m counterclockwise</u>

Learn more here:

brainly.com/question/19044661

brainly.com/question/19247046

<em>The probable question drawing obtained from a similar question online is attached</em>

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2 years ago
Provided the amplitude is sufficiently great, the human ear can respond to longitudinal waves over a range of frequencies from a
riadik2000 [5.3K]

Answer:

Check the explanation

Explanation:

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the wavelength is

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