A bike accelerates at a rate of 2.4 meters per second squared when acted on by a force of 50.0 newtons. What
will be the rate of acceleration of the same bike if acted on
by a force of -40.0 newtons?

the answer would be 32*f

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y