An object whose mass is 80 grams has an acceleration of 20 meters per seconds squared. What calculation will give us the sum of the forces that act on the object, in Newtons

The sum of forces acting on the object is 1.6 N

Step-by-step explanation:

F = force (N)

m = mass (kg)

a = acceleration (m/s²)

F = ma

or rather:

Sum of all Fs = ma

The sum of all forces refers to all forces acting to move the object fowards (e.g. force produced by the engine of a car) take all forces acting to stop the object moving forward (e.g. friction or air resistance)

In this case:

F = 0.08 × 20

F = 1.6 N

4 + 5 7/9= 9 7/9

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4