MCQ
The force required to keep a body in uniform circular motion is
- ✓Centripetal force
- BCentrifugal force
- CResistance
- DNone of the above
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$(i)$ a body with large reflectivity is a poor emitter
$(ii)$ a brass tumbler feels much colder than a wooden tray on a chilly day
$(iii)$ the earth without its atmosphere would be inhospitably cold
$(iv)$ heating systems based on circulation of steam are more efficient in warming a building than those based on circulation of hot water

