How high does Pete lift his sledge hammer if he used a force of 25N to lift the hammer while doing 50J of work?
1 answer:
You might be interested in
Answer:
5. 9GmM/(10R)
Explanation:
m is the mass of the satellite
M is the mass of the earth
W is the energy required to launch the satellite
Energy at earth surface = Potential energy (PE) + W
W = Energy at earth surface - Potential energy (PE)
But PE =
Therefore: W = Energy at earth surface -
Energy at earth surface (E) at an altitude of 5R =
But
Therefore:
W = E - PE
Answer:
R = 28.125 ohms
Explanation:
Given that,
The voltage of a bulb, V = 4.5 V
Current, I = 0.16 A
We need to find the resistance of the filament. Using Ohm's law,
V = IR
Where
R is the resistance of the filament
So,
So, the resistance of the filament is equal to 28.125 ohms.