# Physics  Physics homework 3 questions ASAP

I need these question explained in detail and work shown due Sunday 27th2. A bullet with a mass of 0.01 kg is fired horizontally into a block ofwood hanging on a string. The bullet sticks in the wood and causesit to swing upward to a height of 0.1 m. If the mass of the woodblock is 2 kg, what was the initial speed of the bullet?4. A person on a swing moves so that the chain is horizontal at theturning points ( ● Figure 3.48). Show that the centripetal accelera-tion of the person at the low point of the arc is exactly 2 g, regard-less of the length of the chain. This means that the force on thechains at the low point is equal to three times the person’s weight.(Hint: The vertical distance between the turning point and the lowpoint equals the length of the chain.)6. The “shot” used in the shot-put event is a metal ball with a mass of7.3 kg. When thrown in Olympic competition, it is accelerated to aspeed of about 14 m/s. As an approximation, let’s say that the athleteexerts a constant force on the shot while throwing it and that itmoves a distance of 3 m while accelerating.(a) What is the shot’s kinetic energy?(b) Compute the force that acts on the shot.(c) It takes about 0.5 s to accelerate the shot. Compute the powerrequired. Convert your answer to horsepower.