College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 55

A ball rolls down a roof that makes an angle of 30° to the horizontal (Fig.). It rolls off the edge with a speed of 5.00 m/s. The distance to the ground from that point is two stories or 7.00 m. (a) How long is the ball in the air (b) How far from the base of the house does it land (c) What is its speed just before landing

FIGURE There she rolls See Exercise. (Not drawn to scale.)