Is the wavelength of the radiation that excites a fluorescent material greater than, less than,
or equal to the wavelength of the radiation that the
material emits? explain

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

not too sure thinking all accelerations are pointed down

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.