Answer:
1.48×10⁻⁷ Newtons
Explanation:
From the question,
According to newton's law of universal gravitation.
F = Gmm'/r²........................ Equation 1
F = gravitational force, G = gravitational constant, m = mass of the first ball, m' = mass of the second ball, r = distance between the balls.
Given: m = m' = 8 kg, r = 17 cm = 0.17 m, 
Constant : G = 6.67×10⁻¹¹ Nm²/kg²
Substitute these values into equation 1
F =  (6.67×10⁻¹¹×8×8)/(0.17²)
F = 1.48×10⁻⁷ N
 
        
             
        
        
        
Answer:
1. they both act on an object in free fall
Explanation:
2. both help determine how fast the object will accelerate
 
        
             
        
        
        
True
Explanation:
A base is a substance that is often used as the chemical opposite of an acid. 
Both behaves in opposite way to one another. 
They can be said to complementary or conjugate chemicals. 
- According to Bronsted-Lowry  theory, an acid is a proton donor and a base is a proton acceptor. 
- The lewis theory states that an acid is an electron pair acceptor while a base is an electron pair donor. 
- Acids turn blue litmus paper red and bases turns red litmus paper blue. 
learn more : 
Acid brainly.com/question/11062486
#learnwithbrainly
 
        
             
        
        
        
Yes, it's true. 
But 2nd Newton Law always come to play when the horse is to move forward because obviously the forces interact antagonistically and mass has to be accounted for. 
That's what I think. Hope it's right, all the best.