Physics
Work and Energy
Page 18 of 23
#137 Instantaneous power delivered by a constant force is:
A) $P=F^2v$
B) $P=F/v$
C) $P=Fv\sin\theta$
D) $P=\vec F\cdot\vec v$
#138 Instantaneous power delivered by a constant force is:
A) $P=F/v$
B) $P=F^2v$
C) $P=\vec F\cdot\vec v$
D) $P=Fv\sin\theta$
#139 For a conservative force, the potential energy function $U$ satisfies:
A) $\vec F=-\nabla U$
B) $\nabla\cdot\vec F=U$
C) $\vec F=+\nabla U$
D) $\nabla\times\vec F=\nabla U$
#140 Instantaneous power delivered by a constant force is:
A) $P=F^2v$
B) $P=\vec F\cdot\vec v$
C) $P=Fv\sin\theta$
D) $P=F/v$
#141 Dimensions of power are:
A) $M^{0}L^{0}T^{-1}$
B) $ML^{2}T^{-2}$
C) $ML^{2}T^{-3}$
D) $MLT^{-2}$
#142 For a conservative force, the potential energy function $U$ satisfies:
A) $\nabla\cdot\vec F=U$
B) $\vec F=-\nabla U$
C) $\vec F=+\nabla U$
D) $\nabla\times\vec F=\nabla U$
#143 The work–energy theorem for a particle of mass $m$ is:
A) $W_{\text{net}}=\Delta K$
B) $W_{\text{net}}=\Delta U$
C) $W_{\text{net}}=m\Delta v$
D) $W_{\text{net}}=\Delta p$
Page 18 of 23
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