Monique has a mass of 46 kg and she is sitting on a swing that hangs 0.50 m above the ground. Pierre pulls the swing back and releases it when the seat is 1.40 m above the ground. How fast is Monique moving when the swing passes through its lowest point?

The answer is 4.2m/s, but I don't know how to arrive at the answer.

1 answer

The Potential Energy at the start of the swing has to equal the KE at the bottom.

mg(1.40-.50)=1/2 m v^2

v=sqrt((2*.90)g)=4.2 m/s
Similar Questions
    1. answers icon 0 answers
    1. answers icon 0 answers
  1. Betty weighs 427 N and she is sitting ona playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and
    1. answers icon 1 answer
  2. Betty weighs 427 N and she is sitting ona playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and
    1. answers icon 0 answers
more similar questions