1 A plane is dropping packets of aid as it flies over a flooded village. The speed of a packet when it leaves the plane is \(60 \mathrm {~ms} ^ { - 1 }\). The packet has mass 25 kg .
The packet falls a vertical distance of 34 metres to reach the ground.
- Calculate the kinetic energy of the packet when it leaves the plane.
- Calculate the potential energy lost by the packet as it falls to the ground.
- Assume that the effect of air resistance on the packet as it falls can be neglected.
- Find the kinetic energy of the packet when it reaches the ground.
- Hence find the speed of the packet when it reaches the ground.