Question

Help please

Answer 1

@Vocaloid

Answer 2

F = kx

8 = (44)x

solve for x

Answer 3

D

Answer 4

good

Answer 5

highest velocity is at lowest point (kind of like the spring, where it's in the middle) so point C

Answer 6

you have two forces here, gravity + the tension force from the spring

no motion = forces cancel out

so mg = kx

solve for x

Answer 7

B

Answer 8

good

Answer 9

initial potential energy = final kinetic energy

so

(1/2)kx^2 = (1/2)mv^2 solve for v

Answer 10

b

Answer 11

good

Answer 12

List five examples from daily life in which you see periodic motion caused by a spring or cord.

Answer 13

1. a car going over a road bump
2. a wrist watch

Answer 14

a bit confused about the car going over a bump being periodic motion?

Answer 15

are you talking about the shock absorbers in the car?

Answer 16

Yes

Answer 17

oh, ok

Answer 18

would that be correct for one of the options

Answer 19

yeah, I'd just be sure to specify that the shock absorbers are the spring

Answer 20

okay and what about the watchj?

Answer 21

And what about a hair tie that is stretchy and would act as a cord?

Answer 22

yeah for the watch + hair tie, if it's pulled back and let go (while still holding on to one end) the motion should be periodic

a guitar string is the only other example I can really think of rn

Answer 23

bouncing basketball?

Answer 24

I am not sure if that's caused by a spring/cord

Answer 25

ocean wave?

Answer 26

a swinging tire swing

Answer 27

probably the swing (not the ocean wave, not a string/cord)

Answer 28

so that's 5 I think :S

Answer 29

Yes it is = Thanks

Answer 30

List five examples from daily life in which you see periodic motion caused by a pendulum

Answer 31

Pendulums include any freely hanging object that swings freely once it is pushed.

Answer 32

one of those swinging things that hypnotists use (usually a watch or trinket of some kind)

a metronome

Answer 33

a person sitting on a swing without ,moving

Answer 34

okay so
1. a metronome
2. a person sitting on a swing without moving

Answer 35

just three more ufgg

Answer 36

an early version of a seismoscope (to measure earthquakes) had a pendulum like motion

Answer 37

also one of these rides, called pendulum rides (so we're up to 4 now)

Answer 38

oh, and 5, a yo-yo

Answer 39

wrecking ball too right

Answer 40

yup

Answer 41

wrecking ball is probably better than yo yo actually

Answer 42

thank you so much