Select T-True, F-False, for each statement. If the first is T and the rest F, en
ID: 1576315 • Letter: S
Question
Select T-True, F-False, for each statement. If the first is T and the rest F, enter TFFFFF.
A) Less power is required while lifting a box up quickly than while slowly lifting it.
B) Energy is required to do work.
C) Energy conservation law for a projectile (no friction): Potential energy decrease equals the kinetic energy increase.
D) Without friction, the sum of the potential and kinetic energies of a body is constant.
E) Work cannot be done in the absence of motion.
F) Work is done when the form of energy changes.
Explanation / Answer
(A)
Flase
because power = wordone / time
to lift quickly we must do more work which leads more power
(B)
True because Energy is defined as ability to do the work
(c)
True from the conservation of energy total energy remains constant
(D)
True
(E)
False
(D)
True from the work energy theorem W = del KE
so correct option is FTTTFT