If the mass of a
sliding block is tripled while a constant netforce is applied, by
how much does the accelerationdecrease?

The final acceleration becomes (1/3) of the initial acceleration.

Explanation:

The second law of motion gives the relationship between the net force, mass and the acceleration of an object. It is given by :

m = mass

a = acceleration

According to given condition, if the mass of a  sliding block is tripled while a constant net force is applied. We need to find how much does the acceleration decrease.

Let a' is the final acceleration,

m' = 3m

So, the final acceleration becomes (1/3) of the initial acceleration. Hence, this is the required solution.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.