a machine lifts a 50 kg mass to a height of 60 m in 4s. Calculate the power developed by the machine (take g= 10 m/s)​​

Explanation:

Power is given by , where is work and is elapsed time. To calculated work, we'll use , where is force and is displacement. Substituting given values, we have:

.

Now plugging this in to our power equation, we get:

The power developed by the machine is 7700 Watt.

Explanation:

the higher the current the higher the mag field around it the higher the influence on the compass

we need to know the time interval during which the force acts. impulse of force = momentum change