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Dima020 [189]
3 years ago
15

Lonnie pitches a baseball of mass 0.20 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to

Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s what is the impulse experienced by the ball? A. 360 N.s B. 20 N.s C. 400 N.s D. 9.0 N.s
Physics
1 answer:
suter [353]3 years ago
4 0

Answer:

B) 20N.s is the correct answer

Explanation:

The formula for the impulse is given as:

Impulse = change in momentum

Impulse = mass × change in speed

Impulse = m × ΔV

Given:

initial speed  = 40m/s

Final speed = -60 m/s (Since the the ball will now move in the opposite direction after hitting the bat, the speed is negative)

mass = 0.20 kg

Thus, we have

Impulse = 0.20 × (40m/s - (-60)m/s)

Impulse = 0.20 × 100 = 20 kg-m/s or 20 N.s

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Answer:45\hat{i}+50\hat{j}

Explanation:

Truck velocity=50 km/hr

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Let they start at t=0 s

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In vector Form(r_1)=50\hat{j}

For Police car displacement=45\times 1=45 km

in vector form(r_2)=-45\hat{i}

r_{12}=50\hat{j}-(-45\hat{i})

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Answer:

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Explanation:

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3 0
3 years ago
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Answer:

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8 0
3 years ago
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dimaraw [331]
You multiply force times friction
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A _____ has to do with the direction of a force​
Elenna [48]

Answer:

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Explanation:

i think i hope this helps

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