please solve... The ballistic pendulum (see figure a) is a device used to measur

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The ballistic pendulum (see figure a) is a device used to measure the speed of a fast-moving projectile such as a bullet. The bullet is fired into a large block of wood suspended from some light wires. The bullet is stopped by the block, and the entire system swings up to a heighth. It is possible to obtain the initial speed of the bullet by measuringhand the two masses. As an example of the technique, assume that the mass of the bullet,m1, is4.85g, the mass of the pendulum,m2, is1.083kg, andhis5.10cm. Find the initial speed of the bullet,v1i.
m/s

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