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A spring has a length of 0.230 meter when a 0.300 kilogram mass hangs from it, and a length of 0.750 meter when a 1.80 kilogram mass hangs from it.
(a) Evaluate the force constant of the spring?
N/m
(b) Calculate the unloaded length of the spring?
m
When a cannon with a longer barrel is fired, the force of expanding gases acts on the cannonball for a longer distance. What effect does this have on the velocity of the emerging cannonball
What approximations or simplifying assumptions must you make in the calculations? (Note: Some of these choices are false because they are wrong physics!)
Three children each of weight 356N make a long raft by lashing together logs of diameter 0.30m and length 1.8m. how many logs will be needed to keep them afloat in fresh water. take density of the logs to be 800kg/m^3.
Suppose there is an astronaut who is traveling at a significant fraction of the speed of light. How long does it take according to the astronaut in years
A 10.0g plastic ball is dropped from a height of 3.30m and is moving at 3.00m/s, How much mechanical energy was lost during the balls fall
The turntable of a record player has an angular speed of 9.7 rad/s at the instant it is switched off. 4.0 sec later, Find through how many radians does the turntable rotate from the time it is turned off until it stops
If the speed of sound is 343 m/s, obtain the lowest frequency sound that will form a standing wave in a 2 meter long tube with a node at once end and antinodes at the other
A dentist's drill starts from rest. After 3.30 s of constant angular acceleration it turns at a rate of 2.8 x 10^4 rev/min, Determine the angle (in radians) through which the drill rotates during this period
1.0 kg block is at rest on a table. a 20.0 gr bullet is fired vertically up from under the table.the bullet goes
A certain automobile engine is performing work at the rate of 28300 W (38 hp) with an efficiency of 23%. At what rate is heat being expelled by the engine
Consider an organ pipe 2.1 m long that is closed at one end and open at the other. What is the fundamental frequency of the pipe
A forward horizontal force of 12N is used to pull a 240N crate at constant velocity across a horizontal floor. What is the coefficient of friction
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