Question

3. A child rides a sled down a 10-m-long slope inclined at a 30°-angle above the horizontal. Right at the bottom of the hill the child collides with a snowman. The collision brings the sled to a rapid due to gravity of an object on a surface inclined by an angle0 above the horizontal is g sin θ. [18 points] (a) For each of the following times, does the acceleration vector of the sled point up the hill. down the hi, or is it zero? 4] (i) The instant the sled is let go at the top of the hill but has not yet gained any downhill velocity (ii) The point in time when the sled is halfway down the hill. ii) A small fraction of a second after the sled has hit the snowman iv) A small fraction of a second after the sled has come to rest as the result of the collision b) How long is the child's sled ride from the moment they start moving to the point when they hit the snoman? [9] c) With what speed does the child hit the snowman? [5]

Answer 1