3 years ago

A baseball with the mass of .8kg is thrown from rest to a velocity of 36 m/s in 0.1s.

1 answer:

Sati [7]3 years ago

6 0

A = (v-u)/t
v - speed
u - initial speed (zero here)
t - time taken
a=(36-0)/0.1 = 360 m/s^2

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Natalija [7]

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It is given that,

Length of the copper wire, l = 4.4 m

Diameter of copper wire, d = 1.3 mm = 0.0013 m

Radius of copper wire, r = 0.00065 m

The resistivity of the copper wire, $\rho=1.68\times 10^{-8}\ \Omega-m$

We need to find the resistance of the copper wire. It is given by :

$R=\rho\dfrac{l}{A}$

$R=1.68\times 10^{-8}\ \times \dfrac{4.4\ m}{\pi (0.00065)^2}$

R =0.055 ohms

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