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A small steel sphere of mass 0.40 kg is attached by a 0.50 m long cord to a swivel pin set into the surface of a friction-less table top. This sphere moves in a circle on the horizontal surface with a speed of 6.0 m/s.
a) what is the magnitude of the centripetal acceleration of the sphere?
b) what is the tension in the cord?
A 220, 45.0-cm-diameter turntable rotates on frictionless bearings at 55. A 21.0 block sits at the center of the turntable. A compressed spring shoots block radically outward along a frictionless groove in the surface of the turntable.
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
We pass a laser beam through a double slit. On a screen 18.52 m away, we observe a series of bright lines which are 3.4 mm apart. What is the distance between the two slits
It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.45 m/s2. Find out the acceleration in this situation at the moment the hawk's speed is 4.60 m/s.
A sailboat is travelling east at 4.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.35 m/s2 30° north of east). What is the boat's speed 6.0 seconds later while the gust subsides.
A heart defibrillator passes 11.0 A through a patient's torso for 5.00 ms in an attempt to restore normal beating, What was the path's resistance?
A rope applies a horizontal force of 180N to pull a crate a distance of 2m across the floor A frictional force of 60N opposes this motion.
for a horizontal block spring system, the maximum displacement is 15cm. if k = 150N/m, calculate the mass of the block, calculate maximum value of kinetic energy
As part of a safety investigation, two 1900 cars traveling at 25 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier an..
A dry cell does 7.5. J of work through chemical energy transfer 5 C between terminals of the cell. What is the electric potential between the two terminal.
The starter motor of a car engine draws an electric current of 42.0 A from the battery. The copper wire to the motor is 6.00 mm in diameter and 1.71 m long, What is the current density in the wire
There is also blue light which has a transmitted angle in the water that is 0.56 degrees smaller than that of the red light in the water. What is the incident angle of blue light
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