The force exerted on a 10-kg mass is given by where the units are SI.If the mass starts from rest,its velocity after 2 s is
A)14 m/s
B)2.0 m/s
C)2.4 m/s
D)0.20 m/s
E)0.24 km/s

Question

The force exerted on a 10-kg mass is given by  where the units are SI.If the mass starts from rest,its velocity after 2 s is
A)14 m/s 
B)2.0 m/s 
C)2.4 m/s 
D)0.20 m/s 
E)0.24 km/s

Quizplus · Accepted Answer

Using the formula, force = mass x acceleration, we can find the acceleration of the 10-kg mass to be:
a = F/m = (11eaa331_f51f_37b3_9fad_b70fbcf6b814_TB6079_00)/10 = 1.1 m/s^2
Then, we can use the kinematic equation, v = u + at, where u is the initial velocity (which is 0 m/s), to find the final velocity after 2 seconds:
v = 0 + (1.1 m/s^2) x (2 s) = 2.2 m/s
Therefore, the best choice is C, which is 2.4 m/s (rounded to one decimal place). The other choices are either too high or too low, and some even have the wrong units (such as E, which is given in km/s instead of m/s).

The Force Exerted on a 10-Kg Mass Is Given by