A 1.00 kg hammer dropped from a height of 2.00 m on the moon (a frictionless environment where g = 1.63 m/s2) gains how much kinetic energy? a. 1.00 J b. 1.63 J c. 2.00 J d. 3.26 J

When an object is heated it contracts. a. true b. false

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?

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?