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monitta
3 years ago
13

A football player is preparing to punt the ball down the field. He drops the ball from rest and it falls vertically 1.0 m down o

nto his foot. After he kicks it, the ball leaves the foot with a speed of 18.5 m/s at an angle 57° above the horizontal.
What is the magnitude of the impulse delivered to the ball in kilogram meters per second after he kicks it? An American football has a mass of 425 g.

Physics
1 answer:
Doss [256]3 years ago
4 0

Answer: Impulse = 6.37kgm/s

Explanation: please find the attached file for the solution.

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The coordinate of a particle in meters is given by x(t)=1 6t- 3.0t , where the time tis in seconds. The
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Complete question:

The coordinate of a particle in meters is given by x(t)=1 6t- 3.0t³ , where the time tis in seconds. The

particle is momentarily at rest at t is:

Select one:

a. 9.3s

b. 1.3s

C. 0.75s

d.5.3s

e. 7.3s

​

Answer:

b. 1.3 s

Explanation:

Given;

position of the particle, x(t)=1 6t- 3.0t³

when the particle is at rest, the velocity is zero.

velocity = dx/dt

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16 - 9t² = 0

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