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A sack of flour of mass 4.50-kg is lifted vertically at a constantspeed of 4.00 m/s through a height of 13.0 m.
How great a force is required?
How much work is done on the sack by the lifting force?
What becomes of this work?
a) This work becomes kinetic energy.
b) This work becomes potential energy.
c) This work becomes both kinetic and potential energy.
d) This work becomes heat.
A sack of flour of mass 4.50-kg is lifted vertically at a constantspeed of 4.00 m/s through a height of 13.0 m.
How great a force is required?
How much work is done on the sack by the lifting force?
What becomes of this work?
a) This work becomes kinetic energy.
b) This work becomes potential energy.
c) This work becomes both kinetic and potential energy.
d) This work becomes heat.
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Elin HesselLv2
1 Aug 2019