A 0.52-kg block sits on a lab table. There is a forward force of 2.63 N and a force backwards of 0.67 N. What is the acceleration of the block?

a = 3.77 m/s²

Explanation:

Given:

m = 0.52-kg

F = 2.63 N - 0.67 N = 1.96 N (Net Force)

Unknown:

a or acceleration

Formula and solution:

a = F/m

a = 1.96 kg.m/s² ÷ 0.52 kg

Final

a = 3.77 m/s²

There are the same unit in the solution which is kg so we cancel it then the rest which is m/s² combine it in the quotient of 1.96 kg.m/s² or N and 0.52 kg which is 3.769 then round off to nearest hundredths so the final answer is 3.77 m/s²

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.