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One billiard ball is shot east at 3.0 m/s. A second, identical billiard ball is shot west at 1.0 m/s. The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90° and sending it north at 1.49 m/s. What are the speed and direction of the first ball after the collision? Give the direction as an angle south of east.
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. The force generated by the muscles attached to the Achilles tendon is 3000N, and the moment arm of this force is 5cm. a) Draw a free body diagram o..
A particle known as a pion lives for a short time before breaking apart into other particles. Suppose a pion is moving at a speed of 0.993c, What is the lifetime according to a hypothetical person who is riding along with the pion
A proton exeriences a magnetic field B= 1.9 X 10^-4i^ T and electric field E = 3.2 j^ N/C, what is the net force on the proton
A mass of 0.5 kg is attached to a massless spring with a spring constnt of k = 600 N/m. What was the incident speed of the second mass
A lens which is 40.0 cm from an object forms an image of the object on a card 20.0 cm away. Determine what is the focal length of the lens? If the height of the image is .75 cm, what is the height of the object?
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
If an astronaut dropped a small rock near the surface of Neptune, how far (in m) would the rock fall in 1.5 s
The displacement vectors 38.5 cm at 15.0° and 23.0 cm at 62.0° both start from the origin and form two sides of a parallelogram. Find the area of the parallelogram
The electric field in the region between horizontal, oppositely charged, flat metal plates is approximately uniform. Find the position of the electron at time t = 0.1?s after entering the electric field
Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation. What is the radius (in cm) of coil 2
An Australian emu is running due east in a straight line at a speed of 12.5 m/s and slows down to a speed of 11.4 m/s in 7.3 s. (a) What is the direction of the bird's acceleration? north south east west.
A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, find the absolute pressure PB in the bulb
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