What is the velocity of a dropped object after it has fallen for 7s?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping