PROB 3A: The block releases from the spring at point A, compressed with an amount of 0.11 m. The block travels up on the rough inclined surface and hits the wall at point B, then goes down a distance s=1.5m to point C where it stops. The coefficient of restitution between the block and wall is e=0.65. Find the spring constant k.

Forming a shock absorber, two springs of equal length are nested together. If the maximum compression of the springs is 0.25 and the outer spring has a stiffness of Ka = 420 N/m, what stiffness is required of the inner spring Kb? The design of the spring system is such that if a mass of 2.5 kg is at rest, then dropped from a distance of 0.75 m above the springs, the spring system will catch and stop the mass.

Determine the maximum compression of the spring after the collision.

The roller coaster car has a mass of 900 kg, including its passenger. It is released from rest at the top of the hill A. Neglect friction, the mass of the wheels, and the size of the car. Take hp = 19 m, PB = 9.5 m, hc = 14 m, and pc = 7 m. (Figure 1) Figure h hB B hc C BRE 1 of 1 Part A Determine the minimum height of the hill crest so that the car travels around both inside the loops without leaving the track. Express your answer to three significant figures and include the appropriate units. h = Submit Part B NB = Submit Part C 0 Nc = Value Submit What is the normal reaction on the car when the it is at B? Express your answer to three significant figures and include the appropriate units. μᾶ Request Answer Di μA Value Request Answer LO ☛ μA Units What is the normal reaction on the car when the it is at C? Express your answer to three significant figures and include the appropriate units. Value www Request Answer Units ? Units wwwww ? ?