Question

ï. When a pendulum swings with a small angle its motion is approximately simple harmonic when it swings aa arger ang e, why does tis not work anymore. a Because the acceleration is no longer proportional to the displacement. O b. Because the acceleration then depends on the mass. O c. Because the restoring force is now inversely proportional to the displacement. O d. Because the force is no longer a restoring force at large angle 2. Pendulum A has a mass of 100 g and pendulum B has a mass of 250 grams. They have the same length. The pendulum with the longest period will be O a Pendulum A b. Pendulum B. OC. They will have the same period. 3. As you drive your car down the road, you notice a rattle in one of the doors. You notice that it is worst at 35 miles hour. When you are going either 25 or 45 it doesn't rattle much at all. This is most likely a consequence of O a critical damping. Oc.overdamping. bsonance. d. the restoring force.

Please give correct answers

Answer 1

1) d) because force is no longer a restoring force at an angle

2) Time period = 2pi*sqrt(L/g)

time period depends on length and acceleration due to gravity and not on mass

so both will have same period

so option c) is the correct answer

3)