Answer:
joules
Explanation:
The electric energy transferred to a resistor in a time period is equal to the electric power multiplied by time, E=Pt, and can also be calculated using E=I2Rt. Electric companies measure their energy sales in a large number of joules called a kilowatt hour (kWh) which is equivalent to 3.6×106 J.
Explanation:
The formula for KE ( Kinetic Energy ) is : 1/2 mv²
Solution:
- First we solve for v ( velocity ) using the formula 2gh, where g is gravity [ 9.8 m/s² ] and h is height [ 1.25 m ]
= 2 ( 9.8 m/s² × 1.25 m ) = 24.5 m/s
- The velocity is 24.5 m/s.
- Now solve for KE using the formula 1/2 mv²
= 1/2 ( 40 kg × 24.5m/s ² )
= 1/2 ( 40 kg × 600.25 )
= 1/2 ( 24,010 )
= 12,005 Joules
- The diver's kinetic energy is 12,005 J.
