Vector quantities are always defined by magnitude and its direction.
Here, to define number of coins in a piggy bank, we don't need direction. Hence it is a scalar quantity.
Answer:
The player's speed is 1.93 m/s.
Explanation:
Given that,
Mass of football = 71.5 kg
Speed = 2.00 m/s
Mass of football = 0.470 Kg
Speed = 12.5 m/s
We need to calculate the initial momentum of the football player and ball
Put the value into the formula
We need to calculate the final momentum of the system
Put the value into the formula
We need to calculate the relative to the ground
Using conservation of momentum
Put the value into the formula
Hence, The player's speed is 1.93 m/s.
Answer:
500J
Explanation:
The arrow will have an energy of 500J after it has been released from its state of rest.
This is compliance with the law of conservation of energy which states that "in every system, energy is neither created nor destroyed but transformed from one form to another".
- The energy at rest which is the potential energy is 500J
- This energy will be converted to kinetic energy in total after the arrow has been released.
- This way, no energy is lost and we can account for the energy transformations occurring.
An ionic compound is a giant structure of ions. The ions have a regular, repeating arrangement called an ionic lattice . The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.