If the ball is thrown upwards, the energy changings are
A) K.E changes to G.P.E
B) G.P.E changes to K.E
C) K.E changes to mechanical energy
D) mechanical energy changes to K.E
Correct Answer:
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Q6: Average power of all activities of our
Q7: Change in G.P.E can be written as
A)mgh
B)mh
C)mg
D)gh
Q8: Efficiency of car engine is only about
A)10%
B)20%
C)30%
D)80%
Q9: Work is defined as
A)F × S
B)F ×
Q10: Energy transferred to stone of weight 10
Q11: If force of 1 N moves an
Q12: SI units for energy and work are
A)Joules
Q14: 1 W is equal to {{}}
A)10 J
Q15: Work done by force of gravity on
Q16: A weight-lifter raises weights with a mass
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