Multiple Choice
A 2.0-kg block slides down a fixed,rough curved track.The block has a speed of 5.0 m/s after its height above a horizontal surface has decreased by 1.8 m.Assume the block starts from rest.What is the change in mechanical energy of the block caused by the force of friction during this descent?
A) -14 J
B) -12 J
C) -10 J
D) -16 J
E) -25 J
Correct Answer:
Verified
Correct Answer:
Verified
Q3: A 2.0-kg mass is projected from the
Q44: A skier weighing 0.70 kN goes over
Q45: A 2.0-kg mass is projected vertically upward
Q48: A 0.04-kg ball is thrown from the
Q50: Objects A and B,of mass M
Q51: A simple pendulum,2.0 m in length,is
Q52: A 6.0-kg block slides along a horizontal
Q56: Two masses, M<sub>A</sub> and M<sub>B</sub>, with M<sub>B</sub>
Q61: A particle is acted upon by only
Q82: While running, a person dissipates about 0.6