Question

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Answer 1

Step-by-step explanation:

When a satellite moves around the Earth, then the direction of the force of gravity on the satellite is perpendicular to its displacement. Hence, the work done on the satellite by the Earth is zero.

Answer 2

Answer:

The curved part of new shape is 1/4th of circles perimeter, and straight line is radius.

Radius of original circle=16 cm

So, perimeter=2πr=2π×16=32π

So, perimeter of curved part of new shape = 1/4 ×32π=8π

Now perimeter of new shape =4×perimeter of curved part+2×radius

=4×8π+2×16=32π+32

So the perimeter changes.

The perimeter is increased by 32cm

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