A 260 kg piano is pulled up a frictionless 13 m plank to get it through French doors that are located 5.0 m above the ground. a. How much GPE (relative to the ground) does the piano have when it is inside the French doors? b. How much force is needed? c. How much force would be necessary to slowly lift the piano straight up?
Added by Jodi P.
Step 1
Given: Mass of the piano, m = 260 kg Height above ground, h = 5.0 m The formula for gravitational potential energy is: \[ GPE = mgh \] Substitute the values: \[ GPE = 260 \, kg \times 9.81 \, m/s^2 \times 5.0 \, m \] Show more…
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