Pls. answer the physics questionare

Dear Student

d) u = 270 kmph
v = 0
s = 2.5 km
a = ?
v2 = u- 2as
0 = (270)- 2 × a × 2.5
0 = 72900 - 5a
5a = 72900
a = 14580 km/h2

(e) Self-erecting toys or roly-poly toys are made spherical at the bottom and made heavier at the bottom.They are made so that center of mass lie a the lower portion of the body.When it is pushed with a smaller force then center of mass line comes little bit upper.By this way the toy wobble for sometime instead of falling.

Regards

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