True or False. Use A for True and B for False. Enter the answer on the line next

Question

True or False. Use A for True and B for False. Enter the answer on the line next to the question. _________ Two balls are dropped from the same height. One ball sticks to the floor and the other bounces off. The ball that bounces off the floor has a larger impulse acting on it than the ball that sticks to the floor. __________ Air bags protect people during a collision by applying very large force over a very short time compared to no air bag present. __________ The period of a simple pendulum depends only on its length. __________ The time for an oscillating object to move from the amplitude to the equilibrium position is called the period. _________ For periodic motion to occur, a constant force is needed. C. Matching, Place the letter of the correct answer next to the statement. Each choice will be used only once. A. amplitude B. period C. frequency D. cycle E. maximum F. minimum G. pendulum H. Hooke's Law I. spring constant J. underdamped K. resonance L. overdamped M. opposite N. increases O. decreases P. conserved Q. momentum R. impulse S. time T. isolated U. elastic V. inelastic W. totally inelastic X. external Y. internal _________ The number of oscillations per second. ________ The physical quantity that causes momentum to change. ___________ When the driving frequency is the same as the natural frequency of oscillation. ___________ Type of system where the net external force is zero. ____________ Type of collision where the kinetic energy is a constant. __________ The maximum displacement from equilibrium. _________ The mathematical relationship that describes the force exerted by a spring.

Explanation / Answer

9. A(true). Change in momentum is more for bouncing ball.

10. B(false). Airbags increases the time, and hence decreases force.

11.A(true). Time period depends on length and accelaration due to gravity, which is constant on earth surface.

12.B(false).Time to move from amplitude to amplitude on other side and back to the first amplitude is called time period.

13.B (false)

14.C.frequency

15.R.impulse

16.K.resonance

17.T.isolated

18.U.Elastic collision

19.A.amplitude

20.H.hooke's law

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