Conservation Of Energy
7 practice questionsEngineering DynamicsStep-by-step solutions
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1
A ball of mass m dropped from height h has, just before impact (ignoring air resistance), a speed of:
A.√(2gh)
B.gh
C.2gh
D.√(gh)
2
With no friction or other losses, a system's total mechanical energy is:
A.Conserved
B.Zero
C.Always increasing
D.Doubled
3
A pendulum bob is released from a height of 0.8 m. Ignoring friction, its speed at the lowest point is (g = 9.81 m/s²):
A.About 3.96 m/s
B.About 7.85 m/s
C.About 1.6 m/s
D.About 0.8 m/s
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