Conservation of Energy 3. Problem 14-68 (Textbook): The 5-kg collar has a velocity of 5 m/s to the right when it is at A (Figure 3). It then travels down along the smooth guide. Determine the speed of the collar when it reaches point B, which is located just before the end of the curved portion of the rod. The spring has an unstretched length of 100 mm and B is located just before the end of the curved portion of the rod. - 200 mm www 200 mm k = 50 N/m

A pen contains a spring with a spring constant of 240 N/m. When the tip of the pen is in its retracted position, the spring is compressed 5.00 mm from its unstrained length. In order to push the tip out and lock it into its writing position, the spring must be compressed an additional 6.60 mm. How much work is done by the spring force to ready the pen for writing? Be sure to include the proper algebraic sign with your answer.

This, the length of the pendulum is 2.16 m. Now you start with the pendulum at 30.5 degrees with respect to the vertical, but rather than releasing it from rest, you give it a push downward. It swings to the other side, and reaches a maximum angle of 50.8 degrees with respect to the vertical. What must have been the initial speed of the pendulum just after you pushed it? 3.12 m/s 3.95 m/s 2.42 m/s 6.32 m/s

Needs Complete typed solution with 100 % accuracy.

Solve C

It takes a flea 1.25 × 10−3 s to reach a peak speed of 0.757 m/s. Mass of the flea is 0.462 × 10−6 kg and insect muscle has a maximum output of 56.4 W/kg. If 20.0% of the flea’s weight is muscle, what is the muscular power output of the flea?

A 5.00 kg partridge is suspended from a pear tree by an ideal spring of negligible mass. When the partridge is pulled down 0.100 m below its equilibrium position and released, it vibrates with a period of 3.40 s. What is its speed as it passes through the equilibrium position? What is a magnitude of its acceleration when it is 0.050 m above the equilibrium position? When it is moving upward, how much time is required for it to move from a point 0.050 m below its equilibrium position to a point 0.050 m above it?

The string in the figure is L = 121 cm long, has a ball attached to one end, and is fixed at its other end. The distance d from the fixed end to a fixed peg at point P is 82 cm. When the initially stationary ball is released with the string horizontal as shown, it will swing along the dashed arc. What is its speed when it reaches (a) its lowest point and (b) its highest point after the string catches on the peg? L. (a) Number 48.69 Units m/s (b) Number 29.0 Units m/s