Question

9. What is the mass of an objectnat is experiencingum.net force of 200/N akd an ageleration of 500

m/s??


10. During a test crash, an air bag inflates to stop a dummy's forward motion. The dummy's mass is 75
kg. If the net force on the dummy is 825 N toward the rear of the car, what is the dummy's
deceleration?

Answer 1

Step-by-step explanation:

9.

Given parameters:

Net force on object = 200N

Acceleration = 500m/s²

Unknown:

Mass of the object = ?

Solution:

According to newton's second law of motion, force is the product of mass and acceleration;

force = mass x acceleration

Insert the parameters and solve;

200 = mass x 500

mass =
`(200)/(500)` = 0.4kg

10:

Given parameters:

Mass of dummy = 75kg

Net force on dummy = 825N

Unknown:

Dummy's deceleration = ?

Solution:

Deceleration is the negative form of acceleration;

Force = mass x acceleration

Acceleration =
`(force )/(mass)`

Acceleration =
`(825)/(75)` = 11m/s²

The deceleration is -11m/s²