IF YOU HELP ME I WILL ANSWER 3 OF YOUR QUESTIONS AT ANY TIME YOU NEED ME TO!!!

A 700N window washer is standing on a uniform scaffold supported by a vertical rope attached at each end. The scaffold weighs 200N and is 4m long. What is the force in the left rope when the man stands 1 m from the left end? Hint: The scaffold is is rotational equilibrium.

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy

Many science fiction movies and tv shows have detected using a nuclear weapon to destroy astroids what problems does plait see with this plan