1. A train moving at a constant speed of 52.0 km/h moves eastfor 38.0 min, then in a direction 45.0ﾃつｰ east of due north for 21.0min, and then west for 65.0 min. What is the average velocity ofthe train during this run? a) magnitude- km/h b) ﾃつｰ(counterclockwise from east) 2. A golf ball is struck at groundlevel. The speed of the golf ball as a function of time is shown inthe figure below, where t = 0 at the instant the ball is struck.The graph is marked in increments of 0.25 s along the time axis,and vmin = 18.60 m/s and vmax = 22.27 m/s. (Values in figure do notnecessarily match values in problem). a) How far does the golf balltravel horizontally before returning to ground level? b) What isthe maximum height above the ground level attained by the ball? 3.A projectile's launch speed is 3.1 times its speed at maximumheight. Find launch angle ?0. 4. In the figure, a ball is thrownleftward from the left edge of the roof, at height h above theground. The ball hits the ground 1.37 s. later, at distance d =20.5 m from the building and at angle ? = 56ﾃつｰ with the horizontal.a) Find h= m b) What is the velocity at which the ball is thrown?Magnitude= m/s Angle= ﾃつｰ relative to the horizontal c) Is that angleabove or below the horizontal? Above/below
