Yes, Sliding friction opposes the movement of the book, slowing it down.sliding That's the 'kinetic' kind.. According to Newton's second law, F=ma. That is, the bear's acceleration should be proportional to the total force acting on the bear. As the bear's velocity is constant, its acceleration is zero. Therefore, the total Force acting on the bear is zero. Thus, the friction has to be equal in magnitude and opposite in direction to the bear's weight. As W=mg, we get that its weight is  <span>9.8*400=3,920 Newton. Thus, the friction acting on the bear is 3,920 Newton</span>
        
             
        
        
        
I would like to visit Pluto because i want to see what a Dwarf planet would look like, i would like to see what kind of minerals are in the planet its self..
Brainliest answer?
        
                    
             
        
        
        
The velocity and acceleration of the skydiver will increase as she falls to the ground. According to Newton’s Law of gravity.
        
                    
             
        
        
        
Answer: The person sitting in the middle of the train sees the back of the train enter ing the tunnel before the front end comes out.
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