question_answer3) Mountain
roads rarely go straight up the slope, but wind up gradually. Why?
question_answer46) Can a body have momentum without energy?
question_answer47) Can a body have energy without momentum?
question_answer49) Can a body have momentum when its energy is negative?
question_answer59) Show that (\[\text{A }={{(\vec{A}.\vec{A})}^{1/2}}\]
question_answer63) Is
it practically possible to have situations where \[(E-V)<0\]?
question_answer65) Give
some example where a force does work on a body but fails to change its K.E.
question_answer68) Name the largest and smallest practical unit of energy.
question_answer69) Is work done by a non conservative force always negative? Comment.
question_answer70) Is linear momentum of a system always conserved?
question_answer73) Is it possible to have a collision in which the whole of KE is
lost?
question_answer77) When an air bubble rises in water, what happens to its potential
energy?
question_answer79) In which motion, momentum changes but K.E. does not?
question_answer82) The momentum of an object is doubled. How does its K.E. change?
question_answer83) Can RE. of an object be negative?
question_answer85) What type of energy is stored in the spring of a watch?
question_answer92) Is
it possible to have a collision in which the whole of K.E. is lost?
question_answer97) Can the scalar product of two vectors be negative?
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