108ms\(^2\)
86ms\(^2\)
4ms\(^2\)
2ms\(^2\)
Correct answer is D
where u = o m/s, t = 10s,
v = 72kmhr\(^{-1}\) ---> (72 X 1000) / 3600
: v = 20 m/s
Acceleration (a) = ( v - u ) / t ---> (20 - 0) / 10
: a = 2m/s\(^2\)
3.2 x 10\(^{-14}\)N
8.0 x 10\(^{-13}\)N
8.0 x 10\(^{-3}\)N
3.1 x 10\(^{13}\) N
Correct answer is B
No explanation has been provided for this answer.
What factors determine the frequency of a note emitted by a vibrating string?
Amplitude of vibration, force constant of string and length of string
Amplitude of vibration, force constant of string, and tension in string
Mass per unit length of string, tension in string and length of string
Force constant of string, tension in string, and length of string.
Correct answer is C
The fundamental frequency of vibrations of a string is inversely proportional to the square root of mass per unit length (linear density),
if the tension and vibrating length of the string are constant.
mgsin \(\theta\) + F
F - mgcos \(\theta\)
mgsin \(\theta\) - F
F + mgcos \(\theta\)
Correct answer is C
The force causing the ball to roll down the inclined plane is greater than the one pulling it up, resolving the force in its component we have \(mgsin\theta\)
therefore the Net Force acting on the ball = \(mgsin\theta\) - F
880J
440J
400J
110J
Correct answer is A
No explanation has been provided for this answer.
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