An airplane travels 70 miles per hour. The magnitude of the resultant velocity of the plane is 90 miles per hour, if it encounters a 20 mile per hour headwind.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

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?