An object of mass 0.9 kg has a speed of 4.2 m/s at position 1 and a kinetic energy of 14.2 J at position 2. Calculate its kinetic energy at position 1, its speed at position 2, and the total work done on the object as it moves from position 1 to position 2.
(a) its kinetic energy at position 1
_________J
(b) its speed at position 2
__________m/s
(c) the total work done on the object as it moves from position 1
to position 2
____________ J
Lets assume that position 1 and position 2 are at the same level
Consider position 1
Kinetic energy ,
ANSWER:
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Consider position 2
Kinetic energy ,
ANSWER:
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(c) when object reached position 2 from position 1 ,its velocity increased
so work is done on the object
ANSWER:
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