When a constant force acts upon an object, the acceleration of the object varies inversely with its mass. When a certain constant force acts upon an object with mass 4 kg, the acceleration of the object is 5 /ms2. If the same force acts upon another object whose mass is 10 kg, what is this object's acceleration?

Step-by-step explanation:

Knowing that being the mass and the acceleration we have:

"When a certain constant force acts upon an object with mass 4kg the acceleration of the object is "

We can calculate that force as:

Now, that force is being aplied to another objet whose mass is 10 Kg and we want to know its acceleration.

Clearing from the force equation we have:

 ("The acceleration of the object varies inversely with its mass")

Then,

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18