Denise is conducting a physics experiment to measure the acceleration of a falling object when it slows down and comes to a stop. she drops a wooden block with a mass od 0.5 kilograms on a sensor on the floor. the sensor measures the force of the impact as 4.9 newtons. whats the acceleration of the wooden block wgen it hits the sensor

Explanation:

As we know that here given parameters are

also we know that force of impact on the floor is given as

now we know by the Newton's 2nd law says that the net force on an object is product of mass and its acceleration

it is given by

now we have

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.