Answer: Force = Mass X Acceleration
F = 5 x 2
F = 10 N
 
        
             
        
        
        
The added weight of the sand puts more downward pressure on the wheels contacting the rails, which would cause the trains speed to decrease.
 
        
             
        
        
        
Answer:
s = 20 m
Explanation:
given,
mass of the roller blader = 60 Kg
length = 10 m
inclines at = 30°
coefficient of friction = 0.25
using conservation of energy
 
 
 
 
 
 
u = 9.89 m/s
Using second law of motion  
ma =μ mg
a = μ g
a = 0.25 x 9.8
a = 2.45 m/s²
Using third equation of motion ,  
v² - u² = 2 a s
0² - 9.89² = 2 x 2.45 x s
s = 20 m
the distance moved before stopping is 20 m
 
        
             
        
        
        
Answer:
There isnt enough in your question to answer the question bro, like we need a picture or something bro.
Explanation: