hiii please help me on this!! <3 (Btw I don't need explanation)

1. A ball on a 2.00-m-long string is revolving in a circle at a constant speed. If the string sweeps out an angle of 60.0 in 0.120 s, what is the frequency of its motion? a. 5.00 Hz c. 1.78 Hz b. 2. 42 Hz d. 1.39 Hz

2. Which of the following are examples of simple harmonic motion?

I flag flutters in the wind.

II violin string sounds a musical note.

III ball bounces on the floor.

D. only I

E. only II

F.I and II only

G. I,II and only III

3. A 3.92-kg pendulum bob is attached to a 4.50M -long string. The pendulum is pulled sideways until the string makes an angle of 18.5 degrees with the vertical. What is the restoring force acting on the pendulum?

a. 3.74 N

b. 3.89 N

c.. 12.2 N

d. 12.7 N

4. A pendulum bob is suspended by a 2.40-m-long string. When the pendulum is pulled sideways so that the angle the string makes with the vertical is 14.5, the restoring force acting on the pendulum is 9.65 N. What is the mass of the pendulum bob?

a. 2.50 kg

b. 3.93 kg

c. 2.42 kg

d. 3.80 kg

5. A 24.8-kg mass, attached to a spring that has a spring constant of 6.85 x 10 ^2N/m, is free to oscillate on a horizontal frictionless surface. The mass is pulled to a position 7.25 cm [N] of its resting position. What will be the acceleration of the mass when it is released?

a. 2.00 m/s2 [N]

b. 2.31 m/s2 [N]

c. 2.00 m/s2 [S]

d. 2.31 m/s2 [S]

6.A 3.45-kg mass, attached to a spring that has a spring constant of 5.82 x 10^2N/m, is free to oscillate on a horizontal frictionless surface. The mass is pulled to a position 10.6 cm [W] of its resting position. What will be the acceleration of the mass when it is released?

a.17.7 m/s2 [E]

b.16.2 m/s2 [E]

c. 17.7 m/s2 [W]

d. 16.2 m/s2 [W]

7. A simple harmonic oscillator consists of a 25.8-kg mass on a horizontal frictionless surface. The oscillations, which reach a maximum speed of 2.25 m/s, have an amplitude of 52.0 cm. What is the spring constant of the spring that is driving the oscillator?

a.3.79 102 N/m

b.5.17 102 N/m

c.4.83 102 N/m

d.6.22 102 N/m

8.A spring with a spring constant of 2.98 x 10^2N/m has a 8.75-kg mass suspended at equilibrium. The mass is pulled down a distance of 25.0 cm and then released. What is the acceleration of the mass when it has risen a distance of 41.0 cm?

a.5.45 m/s2 [up]

b.8.51 m/s2 [up]

c.5.45 m/s2 [down]

d. 8.51 m/s2 [down]

9. A 5.95-kg mass is suspended in equilibrium on a spring. When the mass is pulled down a distance of 7.50 cm and released, it completes 15 oscillations in 9.6 s. Assuming that the loss to friction is negligible, what is the maximum speed of the mass?

a.0.74 m/s

b.0.84 m/s

c.0.64 m/s

d.0.54 m/s

10. When straight waves in a ripple tank pass from a region of deep water to a region of less deep water, which of the following can be observed for the waves?

I.The waves slow down.

II.The waves speed up.

III.The wavelength decreases.

V.The wavelength increases.

A. I and III

b. II and III c. I and IV

d. II and IV

11. When a transverse wave moves through a medium, the medium

a.moves back and forth across the direction of motion of the wave but generally stays in the same place.

b.moves back and forth parallel to the direction of the wave's motion but generally stays in the same place.

c.moves back and forth across the direction of motion of the wave as it travels in the direction of wave motion.

d.moves back and forth parallel to the motion of the wave as it travels in the direction of wave motion.

12. Which of the following affect the length of the wave travelling through a spring?

I.the amplitude of the wave

II.the period of the wave

III.the tension in the spring

a.I, II, and III

b.I and III only

c.I and II only

d.II and III only

13. A 0.750-m-long pulse is travelling at a speed of 6.12 m/s in a spring. How long does it take the pulse to pass any point on the spring?

a.0.123 s

b.0.189 s

c.0.156 s

d.0.211 s

14.A pulse that is travelling in a spring at a speed of 7.29 m/s takes 0.492 s to pass a point in the spring. How long is the pulse?

a.4.15 m

b.3.87 m

c.3.92 m

d.3.59 m

15. You generate a wave in a spring, stretched out on the floor, by oscillating your hand back and forth at a frequency of 2.8 Hz. The wave has a 1.9-m wavelength. If the wave takes 3.7 s to travel to the other end of the spring and back to your hand, what is the length of the stretched spring?

a.8.6 m

b.12 m

c.9.8 m

d.20 m

16.You oscillate your hand back and forth a couple of times so that a short wave train with a wavelength of 2.30 m is created in a spring stretched to a length of 5.50 m. The spring is then stretched an additional 1.50 m, and you make a new wave train using exactly the same motion that you used to create the first wave train. Which of the following observations apply to the wave train in the extended spring compared to the original wave train?

I.The amplitude of the wave train increased.

II.The speed of the wave train increased.

III.The wavelength of the wave train increased.

a.I and II only

b.II and III only

c.I and III only

d.I, II, and III

17.If two waves are said to be out of phase, which of the following applies?

a.The position of the crests from one wave must coincide with the position of the crests from the other wave.

b.The position of the crests from one wave must coincide with the position of the troughs from the other wave. c.The position of the crests from one wave must coincide with the position of the nodal points from the other wave.

d.The position of the crests from one wave must be continually changing relative to the position of the crests from the other wave.