A 0.54 kg block is held in place against the spring by a 65-N horizontal external force. The external force is removed, and the block is projected with a velocity v1 = 1.2 m/s upon
-separation from the spring. The block descends a ramp and has a velocity v2 = 1.4 m/s at the
bottom. The track is frictionless between points A and B. The block enters a rough section at
B, extending to E. The coefficient of kinetic friction is 0.36. The velocity of the block is
v3 = 1.4 m/s at C. The block moves on to D, where it stops. In Fig. 7.4, the initial compression
of the spring, in cm, is closest to: Hint: use hooke's law and substitute k into the spring
energy equation.

Why does the input force have to be greater than the force needed to lift the bale?

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

When does your body conduct current more readily?