Here's the question you clicked on:
amishra
If a mass of 2.0 kg is lifted through a height of 5.0 m, what force does it require to lift it at constant speed?
Doesn't matter how high its lifted. The gravitational force experience = mass * acc. due to gravity. To balance this, an equal force in the opposite direction is required. So first calculate the gravitational force
Gravitational force is 9.81 m/s^2 ? If so, Then we just use f=ma like F= 2*9.81 ? Is this correct?
Wait... your question is what force is needed to keep it stationary or at constant speed. If stationary...do what I told you If constant speed, you need a net force of 0
but yeah that's correct
Wait, what force is needed to lift the object, assuming that we are moving at constant speed. So the force should come out to be negative right?
Lift the object at constant speed..? Force is a vector unit so depending on which direction you put it could be pos or neg
That's the question :/ Okay, thank you so much! :D