For satellite travelling on circular orbit if radius of the orbit increased 4 times then the period of the satellite increased * 2

4

8

none of the above

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?