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Standard XII
Physics
Work Energy Theorem Application
Question

A ball of mass m is thrown up to height h in air with an initial velocity v,as shown.
Air resisitance is considered negligible. The acceleration of free fall is g.
what is the total work done by the gravitational force on the ball during its flight from P to Q?
1205007_b4d23c2d5dbd4e3cae9b643cc1ce3081.png

A
Zero
B
12mv2
C
mgh
D
2mgh
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Solution
Verified by Toppr

A ball of mass =m
Height =h in air
Initial velocity=V
Air resistance is considered negligible
The acceleration of free fall =g
Work done by the gravitational force on the ball during its flight from P and Q
W=F×dWorkdone=Force×displacement
Since displacement
will be 0 Now
Work done W=0


1221466_1205007_ans_6d08e6c9da7e4675b310312736433507.png

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