A horizontal spring with spring constant 110 N/m is compressed 16 cm and used to launch a 2.7 kg box across a frictionless, horizontal surface. After the box travels some distance, the surface becomes rough. The coefficient of kinetic friction of the box on the surface is 0.15. Use work and energy to find how far the box slidesacross the rough surface before stopping.
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Ответ:
0.35 m
Explanation:
We are given that
Spring constant,
Length,l=16 cm=
1 m=100 cm
Mass,m=2.7 kg
Coefficient of kinetic friction,
Initial potential energy,
0
Final potential energy,
According to law of conservation of energy
Ответ:
Option D. is correct.
Explanation:
The object's mechanical energy refers to the sum of the potential and kinetic energies of the object. When an object falls, its potential energy (PE) decreases, and its kinetic energy (KE) increases. The increase in kinetic energy is exactly equal to the decrease in potential energy.
Option D. is correct.