5. A girl whose mass is 52 kg exerts a force of 25 N on a ball. Calculate the a) acceleration of the ball.
b) the final velouhcity of the ball if the time it takes the ball to reach a
distance of 20 m is 3 minutes.
c) work done by the girl.
d) power of the girl.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

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?

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.