Over s> A ball is connected to a light spring suspended vertically as shown in t
ID: 2029739 • Letter: O
Question
Over s> A ball is connected to a light spring suspended vertically as shown in the figure. When pulled downward from its equilibrium position and released, the ball oscillates up and down What forms of energy are there during the motion (circle all that apply) 7. (i) in the system of the ball, the spring, and the Earth? (a) kinetic and elastic potential (b) kinetic and gravitational potential (c) kinetic, elastic potential, and gravitational potential (d) elastic potential and gravitational potential (ii) in the system of the ball and the spring? (a) kinetic and elastic potential (b) kinetic and gravitational potential (c) kinetic, elastic potential, and gravitational potential (d) elastic potential and gravitational potential 8. Mark and David are loading identical cement blocks into David's pickup truck. Mark lifts his block straight up from the ground to the truck, whereas David slides his block up a ramp containing frictionless rollers. Which statement is true about the work done orn the block-Earth system? (a) Mark does more work than Davicd (b) Mark and David do the same amount of work (c) David does more work than Mark (d) No statements are necessarily true because the angle of the incline is unknown (e) No statements are necessarily true because the mass of one block is not given 9. An ice cube has been given a push and slides without friction on a level table. Which of the following statement is correct? (a) It is in stable equilibrium (b) It is in unstable equilibrium (c) It is in neutral equilibrium (d) It is not in equilibrium 10. As a simple pendulum swings back and forth, the forces acting on the suspended object are (a) gravity, (b) the tension in the supporting cord, and (c) air resistance. (i) Which of these forces, if any, does no work on the pendulum (0) Which of these forces does negative work on the pendulum at all times during its motion?Explanation / Answer
Answer:
(7) (i) option (c) kinetic, elastic potential and gravitational potential.
(ii) option(a) kinetic and elastic potential
(8) option (b) mark and David do the same amount of work.
(9) Option (c) it is in neutral equilibirum
(10) (i) tension in the supporting cord
(ii) air resistance does negative work.
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