Answer:
F
Explanation:
Newton's Third Law (Law of Action-Reaction) states:
Every action has an equal and opposite reaction and it occurs between two objects
In this scenario, the action would be the skater pushing off of the wall, therefore the reaction would be the wall pushing off of the skater since the two objects that are interacting are the wall and the skater.
Answer:
(a) 1.16 s
(b)0.861 Hz
Explanation:
(a) Period : The period of a simple harmonic motion is the time in seconds, required for a object undergoing oscillation to complete one cycle.
From the question,
If 1550 cycles is completed in (30×60) seconds,
1 cycle is completed in x seconds
x = 30×60/1550
x = 1.16 s
Hence the period is 1.16 seconds.
(b) Frequency : This can be defined as the number of cycles that is completed in one seconds, by an oscillating body. The S.I unit of frequency is Hertz (Hz).
Mathematically, Frequency is given as
F = 1/T ........................... Equation 1
Where F = frequency, T = period.
Given: T = 1.16 s.
Substitute into equation 1
F = 1/1.16
F = 0.862 Hz
Hence thee frequency = 0.862 Hz
Answer:
a) 73.2N
b) 66.6N
c) 20.28N
Explanation:
F= mg=7.5×9.8=73.5N
Force parallel to the plane Fp= 73.5sin25= 31.06N
b) Fv= 73.5 cos25= 66.6N
c) Ff= u×Fv= 0.312×66.6=20.28N
a) Normal ForceFn= F/(cos25) - Fp - Ff = ma
1.1F -31.06-20.28=7.5×3.82
1.1F -51.84=28.65
1.1F= 28.65+51.84
F= 80.49/1.1
F= 73.2N
1. One
2. Oohm
Hope this helps
Answer:
10
Explanation:
The atomic number is only based on the number of the elements protons. The neutrons and electrons will only change the atomic mass and properties of the element. So the atomic number is 10.
