Answer:
Speed of larger piece is 
Explanation:
We apply the principle of conservation of momentum.
The watermelon is initially at rest. The initial momentum = 0 kg m/s in all directions.
After the collision,
Vertical momentum = momentum of piece in y-direction + y-component of momentum of larger piece = 
Here, 
is the y-component of velocity of larger piece.
This is equal to 0, since the initial momentum is 0.
Horizontal momentum = momentum of piece in x-direction + x-component of momentum of larger piece = 
Here, 
is the x-component of velocity of larger piece.
This is also equal to 0, since the initial momentum is 0.
The velocity of the larger piece, 
, is the resultant of and . Since they are mutually perpendicular,
Answer:
Yes
Explanation:
In the International System of Units (SI), energy is measured in joules. One joule is equal to the work done by a one- newton force acting over a one- metre distance
Answer:Eating. Your muscles in your arms and mouth use energy to feed itself. Then your body digest the food which also takes energy.
Sleep. When your tired, you don’t have much energy. It is said that you use more energy while your sleeping. But how do you become energized if you were using even more energy than before?
Answer:
The wheelbarrow's wheel and axle help the wheelbarrow to move without friction thus making it easier to push or pull. That's why it will be easier to lift a load in wheel barrow of the load is transferred towards the wheel.
