A 4.0-kg block slides along a frictionless surface with a constant speed of 5.0 m/s as shown. Two seconds after it begins sliding, a horizontal, time-dependent force is applied to the mass. The force is removed eight seconds later. The graph shows how the force on the block varies with time.
-What, approximately, is the speed of the block at t = 11 seconds?
A)5.0 m/s
B)16 m/s
C)25 m/s
D)65 m/s
E)75 m/s

Question

A 4.0-kg block slides along a frictionless surface with a constant speed of 5.0 m/s as shown. Two seconds after it begins sliding, a horizontal, time-dependent force is applied to the mass. The force is removed eight seconds later. The graph shows how the force on the block varies with time. 
-What, approximately, is the speed of the block at t = 11 seconds?
A)5.0 m/s 
B)16 m/s 
C)25 m/s 
D)65 m/s 
E)75 m/s

Quizplus · Accepted Answer

The Answer is B

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