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Googl
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I have a question where I am given watts, voltage and time. Let's say the electric motor is 400 watt that is run from 240v mains electricity for 200seconds.
I have managed to calculate the work done using the formula Work done (J) = Power (W) x time taken (J) And I have managed to calculate the current the motor uses using the formula Power = IV.
I have no idea how I would calculate how long it takes for the pulley system to raise 15kg mass vertically 5 metres when the motor is connected to the pulley.
I am also asked to calculate the PE of the fully raised mass, I assume here I would use this formula;
Potential= mgh (Am I right?)
How do I calculate it's velocity after falling for 3.5 metres? Do I use this formula? KE= 1/2 MV^2
Thanks.
I have managed to calculate the work done using the formula Work done (J) = Power (W) x time taken (J) And I have managed to calculate the current the motor uses using the formula Power = IV.
I have no idea how I would calculate how long it takes for the pulley system to raise 15kg mass vertically 5 metres when the motor is connected to the pulley.
I am also asked to calculate the PE of the fully raised mass, I assume here I would use this formula;
Potential= mgh (Am I right?)
How do I calculate it's velocity after falling for 3.5 metres? Do I use this formula? KE= 1/2 MV^2
Thanks.