A unit of acceleration needs a unit of length in the numerator 
and a squared unit of time in the denominator.
Example:    meters / second²
                    feet / minute² 
                    smoots / hour²  
                    furlongs / fortnight² .
Ideally, in order to completely describe an acceleration vector,
you also need to state a direction.
 
        
             
        
        
        
Answer:
The percentage error    e% = Δm/m 100     
Explanation:
The absolute error is the assessment with which measurements are made, it is given by the minimum reading value of a given instrument.
The accepted value is the value measured in an instrument. Or the one calculated by an experiment.
The percentage error is the ratio of the absolute error between the value of the average per 100
       e% = Δm/m 100
 
        
             
        
        
        
Answer:
F-F(gr) = ma
a= {F-F(gr)}/m =
=(15-10)/15=0.33 m/s² (upward)
 
        
             
        
        
        
B. Kinetic energy plus its potential energy.