Question

A 2.0-kg block slides down a frictionless incline from point A to point B. A force (magnit on the block between A and B, as shown. Points A and B are 2.0 m apart.If the kinetic A is 10 J, what is the kinetic energy of the block at B? O N e blo A. a. 27 J b. 20 J c. 24 J e. 37 J ower end supported by a horizontal surface. 13. A spring (k-600 N/m) is placed in a vertical position with its l The upper end is depressed 20 cm, and a 4.0-kg block is placed on top of the depressed spring. The system is then released from rest. How far above the point of release will the block rise? a. 46 cm b. 36 cm c. 41 cm d. 31 cm e. 20 cm A 2.0-kg block sliding on a 200 N/m) zontal frictionless surface is attached to one end of a horizontal spring ( surface is 14. equilibrium position, what is its speed when it is 20 cm from the equilibrium position? which has its other end fixed. If the block has a speed of 4.0 m/s as it passes through the a. 2.6 m/s b. 3.1 m/s c. 3.5 m/s d. 1.9 m/s e. 2.3 m/s 15. A spring with spring constant k-800 N/m is compressed 12 cm from its equilibrium position. A spring with springconstant kー400 Nm has the same elastic potential energy a. 0.060 m. b. 0.085 m. c. 0.12 m. as the first spring when its extension is e. 0.24 m. 6. The value of the momentum of a system is the same at a later time as at an earlier time if there are no a collisions between particles within the system. b. e. d. internal forces acting between particles within the system. e external forces acting on particles of the system. inclastic collisions between particles within the system. changes of momentum of individual particles within the system.

Answer 1

19 vy 96000,2 2(9.8m)の