If an object of mass 10 kg is lifted in 10 mins and 15 s using a motor of 1000 Watt, then what is the amount of wasted energy? What is its efficiency? ps- Efficiency = (amount of work-energy wasted) /energy given
Work(W) = force(F) * distance(s)

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction