Based on the law of conservation of energy, which statement is false?
a.
energy is lost when machines don't work right.
b. we can't add more energy to the universe,
c. we can't destroy energy that exists in the universe.
d.
energy changes from one form to another,

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

Why is metal often used for cooking pan?

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?