A 25.0 kg child on a swing kicks upward on the downswing thus changing the distance from the pivot point to her centre of gravity from 2.40 m to 2.28 m. What is the difference in the resonant frequency of her swing before the kick and afterwards? Answer to three significant digits.
Waves A and B have the same speed, but wave A has a shorter wavelength. Which wave has the higher frequency?
If a Ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s2 , for 3 seconds, what was his ending velocity?
A car advertisement states that a certain car can accelerate from rest to 70km/h in 7 seconds. Find the car’s acceleration in m/s.
Will current flow more easily through a thick wire or a thin wire of the same material when connected to the same material when connected to the same material, when connected to the same source? why?
A resistance of 10ohm is bent in the form of a closed cirle. What is the effective resistance between the two pints of any diameter of this circle?
a car moving at 25 m/s speeds up to 47m/s. it takes 9 seconds to do this.what is the acceleration of the car?
calculate heat produced when 80000 coulombs of charge is transferred in 1/2 hour through a potential difference of 40 volts
