A 0.46-kg block is held in place against the spring by a 30-N horizontal external force. The external force is removed, and the block is projected with a velocity

v_{1} = 1.2 \mathrm {~m} / \mathrm { s }

upon separation from the spring, as shown in the figure. The block descends a ramp and has a velocity

v_{2} = 1.5 \mathrm {~m} / \mathrm { s }

at the bottom. The track is frictionless between points A and B. The block enters a rough section at point B, extending to E. The coefficient of kinetic friction between the block and the rough surface is 0.38. The velocity of the block is

v_{3} = 1.4 \mathrm {~m} / \mathrm { s }

at point C. The block moves on to D, where it stops. What distance does the block travel between points B and D? $A 0.46-kg block is held in place against the spring by a 30-N horizontal external force. The external force is removed, and the block is projected with a velocity v_{1} = 1.2 \mathrm {~m} / \mathrm { s } upon separation from the spring, as shown in the figure. The block descends a ramp and has a velocity v_{2} = 1.5 \mathrm {~m} / \mathrm { s } at the bottom. The track is frictionless between points A and B. The block enters a rough section at point B, extending to E. The coefficient of kinetic friction between the block and the rough surface is 0.38. The velocity of the block is v_{3} = 1.4 \mathrm {~m} / \mathrm { s } at point C. The block moves on to D, where it stops. What distance does the block travel between points B and D? A) 0.30 m B) 0.039 m C) 0.26 m D) 0.40 m E) 0.60 m$
A) 0.30 m
B) 0.039 m
C) 0.26 m
D) 0.40 m
E) 0.60 m

An Ideal Spring Stretches by 21 31.0 cm?31.0 \mathrm {~cm} ?31.0 cm? A) 199 N B) 91 N C) 145 N D)

Multiple Choice

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An Ideal Spring Stretches by 21 $31.0 \mathrm {~cm} ?$ A) 199 N
B) 91 N
C) 145 N
D)

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