You need to lift a 200 kg box 5 meters, but it is too heavy. You decide to push it up an incline that makes a 25 degree angle with the ground. With what force do you need to push the box?

Question

You need to lift a 200 kg box 5 meters, but it is too heavy.  You decide to push it up an incline that makes a 25 degree angle with the ground.  With what force do you need to push the box?

caominhim · Answer

if you use energy equations calculate the potential energy at the top of the ramp and then use the work equation (w =FDcos(theta)) to find the force

or you can find the gravitational component that pushes down the ramp and you have to counter that force with the same amount to bring balance to the force ;D

caominhim · Answer

this all assumes no friction

shamim · Answer

Weight of 200kg box=mg=200*9.8N. Right?

shamim · Answer

Component of weight along the inclined plane=200*9.8*sin25=?

shamim · Answer

So applied force=200*9.8*sin25=?

caominhim · Answer

yep