A toy car is released from rest on a smooth track with a loop de loop. The car is released from
heighth such that it never loses contact with the
track. The system includes the car and Earth.
Rotational effects from the wheels, friction, and
air resistance can be ignored.

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?