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horrorfan [7]
3 years ago
9

A baseball travelling horizontally at 41 m/s [S] is hit by a baseball bat, causing its velocity to become 47 m/s [N]. The ball i

s in contact with the bat for 1.9 ms, and undergoes constant acceleration during this interval. What is that acceleration?
Physics
1 answer:
dmitriy555 [2]3 years ago
8 0

Answer:

46.3\times 10^3 m/s^2

Explanation:

We are given that

Initial velocity of baseball=u=-41m/s

Because final and initial velocity are in opposite direction

Final velocity of baseball=v=47m/s

Time=t=1.9 ms=1.9\times 10^{-3} s

1 ms=10^{-3} s

We have to find the acceleration .

We know that

Acceleration=a=\frac{v-u}{t}

Using the formula

Acceleration=a=\frac{47+41}{1.9\times 10^{-3}}m/s^2

Acceleration=46.3\times 10^3 m/s^2

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A car travels for 5.5 h at an average speed<br> of 75 km/h. How far did it travel?<br> T TE
ANEK [815]

Answer:

\boxed {\boxed {\sf 412.5 \ kilometers }}

Explanation:

Distance is the product of speed and time.

d=s*t

The speed of the car is 75 kilometers per hour. It traveled for 5.5 hours.

s= 75 \ km/hr \\t= 5.5 \ hr

Substitute the values into the formula.

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5 0
3 years ago
A grandfather clock is "losing" time because its pendulum moves too slowly. Assume that the pendulum is a massive bob at the end
IgorC [24]

Answer:

d) shortening the string

Explanation:

Time period of a pendulum clock is dependent on two factors namely:length and acceleration due to gravity.

When a clock loses time, the time period of the pendulum clock increases.

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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
suter [353]

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

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3 years ago
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