A 12-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 0.80 kN/m). The block is initially at rest at its equilibrium position when a force (magnitude P = 80 N) acting parallel to the surface is applied to the block, as shown. What is the speed of the block when it is 13 cm from its equilibrium position?
A)0.78 m/s
B)0.81 m/s
C)0.71 m/s
D)0.58 m/s
E)0.64 m/s

Question

A 12-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 0.80 kN/m). The block is initially at rest at its equilibrium position when a force (magnitude P = 80 N) acting parallel to the surface is applied to the block, as shown. What is the speed of the block when it is 13 cm from its equilibrium position? 
A)0.78 m/s 
B)0.81 m/s 
C)0.71 m/s 
D)0.58 m/s 
E)0.64 m/s

Quizplus · Accepted Answer

The Answer is A

A 12-Kg Block on a Horizontal Frictionless Surface Is Attached