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umka2103 [35]
3 years ago
12

Trying out for the big leagues, you throw a 149 gram baseball at a speed of 85.0 miles per hour. What is the ball's kinetic ener

gy (j) ?
Physics
1 answer:
nika2105 [10]3 years ago
3 0

Answer:

K.E=107.56J

Explanation:

Given data

v=85 miles/hour

convert it to meter per second we get

v=37.9984 meter/second

m (baseball mass)=149 gram

convert it to Kg we get

m=0.149 kg

K.E (Kinetic Energy)=?

Solution

K.E=\frac{1}{2}mv^{2}\\  K.E=\frac{1}{2} *(0.149)* (37.9984)^{2}\\ K.E=107.56J

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inn [45]

Answer:

The difference between the two is, well for one

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It may confuse you but it makes sense to me (Sorry)

Explanation:

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3 years ago
Why was the microscope and its improvement an important part of the development of the cell theory?
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3 years ago
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Yea, gonna need some help. Thanks
natulia [17]

Answer:

t = 3.48 s

Explanation:

The time for the maximum height can be calculated by taking the derivative of height function with respect to time and making it equal to zero:

h(t) = -16t^2+v_ot+h_o\\\\\frac{dh(t)}{dt}=0=-32t+v_o\\\\v_o = 32t

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v₀ = initial speed = 110 ft/s

Therefore,

110 = 32t\\\\t = \frac{110}{32}\\\\

<u>t = 3.48 s</u>

8 0
3 years ago
A mass m = 1.1 kg hangs at the end of a vertical spring whose top end is fixed to the ceiling. The spring has spring constant k
adell [148]

Answer:

a) = 10.22 rad/s

b) = 0.35 m

Explanation:

Given

Mass of the particle, m = 1.1 kg

Force constant of the spring, k = 115 N/m

Distance at which the mass is released, d = 0.35 m

According to the differential equation of s Simple Harmonic Motion,

ω² = k / m, where

ω = angular frequency in rad/s

k = force constant in N/m

m = mass in kg

So,

ω² = 115 / 1.1

ω² = 104.55

ω = √104.55

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If y(0) = -0.35 m and we want our A to be positive, then suffice to say,

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6 0
4 years ago
_______ measures an object's change in position per unit time.
Deffense [45]

I believe your answer should be C. Speed.

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3 years ago
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