hi, i need help please, i have 2 questions i need their completesolutions 1) A 5

Question

hi,
i need help please, i have 2 questions i need their completesolutions

1)
A 5-kg object is moving to the right at 4 m/s and collides withanother object moving to the left at 5 m/s. The objects collide andstick together. After the collision, the combined object:


2)
The ballistic pendulum is a device used to measure the speed of afast-moving projectile such as a bullet. the bullet is fired into alarge block of wood suspended from some light wires. the bullet isstopped by the block, and the entire system swings up to a height h= 5 cm. The mass of the bullet, m1, is 5.00 g, the mass of thependulum wood block, m2, is 1.00 kg. Find the initial speed of thebullet, v1i?



thanks in advance..

Explanation / Answer

1) Has less kinetic energy than the system had before thecollision. 2) v = 2 g h = [ 2 * 9.8 * 0.05] = 0.9899 m/s

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