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Mechanics | Relativity
The temperature outside is 0 degrees C when you are watching a football game. The referee blows his whistle when he is 110m away from your seat. How long does it take before you hear this whistle? How long would it take if the temperature was 35 degrees C and it had to travel the same distance?
Mechanics | Relativity
A person wants to find the gravity on another planet. There is a 1kg mass hanging from a thin wire with a length of 5m. By plucking the wire they can tell that the resulting wave takes .5s to travel the length. The wire has a mass of 100g. What is the gravity?
Mechanics | Relativity
A simple pendulum has an oscillation period of 1.90s, and a mass of 150g, the mass of the string is 2x10^-4kg which is distributed uniformly. If it is hanging vertically and its string is plucked, find the speed of the transverse wave.
Mechanics | Relativity
There is a pendulum with a length of 5m and a mass on the end of 120kg, the gravity is 10m/s2. Can the pendulum reach one side to the other in three seconds?
Mechanics | Relativity
A mass of 2.10 kg is attached to an oscillating spring, and the period of oscillation is 1.50s. Find the spring constant, and if the total energy is 4.55J find the amplitude of the oscillations.
Mechanics | Relativity
A person is standing near a fast moving train.Is there any danger that he will fall towards it?
Mechanics | Relativity
A force acts on 2 kg mass and gives it an acceleration of 3m/s2. What acceleration is produced by the same force when acting on a mass of 1kg?
Mechanics | Relativity
A 100 kg scientist finds that the acceleration of gravity at the north and south pole is measured to be 9.832 m/s^2 and only 9.780 m/s^2 at the equator. If the mass of the Earth is 5.98x10^24 kg, determine the radius of the Earth at the equator and at the poles.
Mechanics | Relativity
A ship of draft 10 m is loading in salt water density 1015 kg/m3. Calculate the cheng in draught on entering salt water of density 1025 kg/m3.
Mechanics | Relativity
With some force i hit the wall and with same force i hit wet clay,does the reaction force same in both case?how can we say that there is same reaction force in both case if we get hurt more in beating the wall than the wet clay?
