A mass of 10 kg, initially at rest on a horizontal frictionless surface, is acted upon by a horizontal force of 25 N. The speed of the mass after it has moved 5.0 m is:

. a)  5.0 m/s 

. b)  10 m/s 

. c)  15m/s 

. d)  125 m/s 

. e)  250 m/s 


My answer:b

1 answer

a = F/m = 25/10 = 5/2
v = √(2as) = √(2 * 5/2 * 5) = 5

so, how did you get B?