Explain why, in adding perpendicular vectors, we can simply draw one vector and then start the second vector from the end of the first. The resultant vector is then from the origin of the first to the end point of the second vector.

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. the area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?