An 88-g arrow is fired from a bow whose string exerts an average force of 110 N on the arrow over a distance of 78 cm. What is the speed of the arrow as it leaves the bow?
Step by step solution:
All the forces acting on a system are giving the acceleration to the puck. Representing it as:
Looking at the block, forces acting on is are the force FT (tension) in the oposite direction of the . That is the reason we will substract FT from Q. The block is moving with constant speed, so we can conclude that the total force acting on it is zero. That comes from Newtons first law.