The statement about "<span>efficiency compared the output work to the output force" is false. Efficiency can be compared from the input work to the output work.</span>
Answer: B 1.52 m/s hope this helps
Explanation: I just took the test
Answer:

Explanation:
From the question we are told that
Radius of curvature
Mass 
initial Speed of Motorcycle 
Final Speed of Motorcycle 
Generally the equation Force at initial speed is mathematically given as



Generally the equation Force at Final speed is mathematically given as



Therefore

W = mg, because you have the weight of the piano and if you just divide it by g that will give you the mass you need. The piano isn't accelerating right now in a way that you'd need to use F = ma.