Answer:
So, this is not the answer because I suck like that (hehe >:3) but here's some helps.
Explanation:
1. The magnitude of the net force acting on an object is equal to the mass of the object multiplied by the acceleration of the object as shown in the formula below. 
2. If the net force acting on an object is zero, then the object is not accelerating, and is in a state known as equilibrium.
3. This will be were you use the info I gave to figure it out. I hope this wasn't completely unhelpful. 
 
        
             
        
        
        
Displacement equals (Velocity times Time) plus half times the (acceleration times time squared). =. (48 * 4) + 1/2 * (12 *12^2) = 288meters
        
             
        
        
        
81°.
The law of reflection states that the angle of incidence is equal to the angle of reflection.
        
             
        
        
        
Explanation:
so sorry 
 
don't know but please mark me as brainliest please 
 
        
             
        
        
        
 
 The work-energy theorem explains the idea that the net work - the total work done by all the forces combined - done on an object is equal to the change in the kinetic energy of the object. After the net force is removed (no more work is being done) the object's total energy is altered as a result of the work that was done.
This idea is expressed in the following equation:
is the total work done
is the change in kinetic energy
is the final kinetic energy
is the initial kinetic energy
mark me as brainliest ❤️