A Hooke's law spring is mounted horizontally over a frictionless surfa

1.5. A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining double the kinetic energy received in the above situation?选项： A:1.41 d; B:1.73 d; C:2.00 d; D:4.00 d; E:5.30 d; F:6.10 d

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1) A 0.20-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.6 cm for equilibrium it has a kinetic energy of 1.4 J and a spring potential energy of 2.2 J. What is the maximum speed of the mass during its oscillation (in m/s)?

3.When we pull a mass attached to horizontal spring on a frictionless surface and hold the mass at some position coordinate x, the force of the spring on m is equal in magnitude and opposite in direction to the force we exert on m. Are these forces a Newton’s third law force pair?选项： A:正确; B:错误

4.Two blocks of different masses are pressed together on a horizontal frictionless surface with a compressed spring between them. They are not attached to the spring. After they are released and have both moved free of the spring: 选项： A:The lighter block will have more kinetic energy than the heavier one.; B:The heavier block will have more kinetic energy than the lighter one.; C:The two blocks will have the same amount of kinetic energy; D:Both will have the same speed

5.Suppose a 0.3-kg mass on a spring that has been compressed 0.10 m has elastic potential energy of 1.0 J. How much further must the spring be compressed to triple the elastic potential energy? ( )选项： A:0.30 m B:0.20 m C:0.17 m D:0.07 m E:0.05 m

6.A 300-g mass at the end of a spring executes SHM with a period of 2.4 s. Find the period of oscillation of a 133-g mass attached to the same spring. 选项： A、1.6 s B、0.033 s C、24.7 s D、0.41 s

7.A 0.20 kg object, attached to a spring with spring constant k = 10 N/m, is moving on a horizontal frictionless surface in simple harmonic motion of amplitude of 0.080 m. What is its speed at the instant when its displacement is 0.040 m? (Hint: Use conservation of energy.)( ) 选项： A、4.9 m/s B、24.5 cm/s C、53 cm/s D、9.8 m/s E、49 cm/s

8.A 0.20 kg object, attached to a spring with spring constant k = 10 N/m, is moving on a horizontal frictionless surface in simple harmonic motion of amplitude of 0.080 m. What is its speed at the instant when its displacement is 0.040 m? (Hint: Use conservation of energy.)( )选项： A:9.8 m/s B:4.9 m/s C:49 cm/s D:24.5 cm/s E:53 cm/s

9.A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If the mass of the object is 0.20 kg, what is the spring constant?( )选项： A:40 N/m B:87 N/m C:126 N/m D:160 N/m E:190 N/m

10.A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If the mass of the object is 0.20 kg, what is the spring constant?( ) 选项：A:40 N/m B:87 N/m C:126 N/m D:160 N/m E:190 N/m

11.A mass of 0.20 kg, hung from a spring with a spring constant of 80.0 N/m, is set into an up-and-down simple harmonic motion. If the mass is displaced from equilibrium by 0.10 m and released from rest, what is its speed when moving through the equilibrium point?选项： A:0; B:1.4 m/s; C:2.0 m/s; D:3.4 m/s

12.Two blocks are at rest on a horizontal frictionless surface with a compressed spring between them. The 10-kg block accelerates when the string holding the system in compression is cut and the 20-kg box accelerates in the opposite direction. What is the magnitude of the force from the expanding spring on the 20-kg box when the 10-kg box is undergoing an acceleration of 8.0 ? 选项： A、40 N B、160 N C、(160/3) N D、80 N E、50 N F、60 N G、100 N H、110 N I、120 N

13.A mass of 0.20 kg, hung from a spring with a spring constant of 80.0 N/m, is set into an up-and-down simple harmonic motion. If the mass is displaced from equilibrium by 0.10 m and released from rest, what is its speed when moving through the equilibrium point? 选项： A、0 B、1.4 m/s C、2.0 m/s D、3.4 m/s

14.Two blocks are at rest on a horizontal frictionless surface with a compressed spring between them. The 10-kg block accelerates when the string holding the system in compression is cut and the 20-kg box accelerates in the opposite direction. What is the magnitude of the force from the expanding spring on the 20-kg box when the 10-kg box is undergoing an acceleration of 8.0 ?选项： A:40 N; B:160 N; C:(160/3) N; D:80 N; E:50 N; F:60 N; G:100 N; H:110 N; I:120 N