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1. Someone shoots a gun while holding their arm stiffly outstretched in front of them and with the back of their shoulder braced against a wall. The bullet leaving the gun has a mass of 2.5 g and is traveling at 380 m/s (.22 caliber). It reaches this velocity (from rest) in 0.0001 s. Assuming that all of the recoil force is directed along the axis of the bones of the forearm, what is the stress in the arm bone? This of the arm as being one long bone, and the cross-sectional area of this bone is 3 cm2.
a. 6.8x109 dyn/cm2b. 4.0x109 dyn/cm2c. 9.4x108 dyn/cm2d. 3.2x109 dyn/cm2e. 7.2x108 dyn/cm2
2. Treat this problem with the simple pendulum in mind. A person pulls a bowling ball 0.5 m behind them and lets gravity cause it to swing forward. Just as the ball reaches the highest point in front of them, they let go. What does the ball's path look like after being released? (NOTE: no need to show work)
An electron enters a region of magnetic field of magnitude 0.010 0T, traveling perpendicular to the linear boundary of the region.The direction of the field is perpendicular to the velocity of the electron.
Hospital patient. A 65.0 kg patient is suspended in a raised hospital bed as shown in the figure. The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the ..
The image behind a convex mirror (radius of curvature = 72 cm) is located 14 cm behind the mirror. Where is the object located? What is the magnification of the mirror?
How many photons are emitted during 7.0 s of operation of a red laser pointer? The device outputs 2.5 Watts at a 635 nm wavelength
Teeing Off A golf club has a lightweight flexible shaft with a heavy block of wood or metal (called the head of the club) at the end. A golfer making a long shot off the tee uses a driver, What is the speed of the club head immediately after the co..
An electron is accelerated to a speed where its total energy is 169 times larger than its rest energy. What is the speed of the electron in terms of the speed of light
A steel rod (? = 7860 kg/m3) has a length of 2.19 m. It is bolted at both ends between immobile supports. Initially there is no tension in the rod, because the rod just fits between the supports. Find the tension that develops when the rod loses 3..
Two identical carts travel at 1m/s in opposite directions on a common horizontal surface. They collide head-on and are reported to rebound, each with the speed of 2m/s.
A 0.74-kg mass attached to a vertical spring of force constant 148 N/m oscillates with a maximum speed of 0.37 m/s. Find the maximum magnitude of the acceleration
Assume blue light (λ = 500 nm) is used to decide the position of an electron to within the wavelength of the light. What will be the uncertainty in the electron’s velocity?
An eagle with a wing span of 2.0m flies due north at 8.0m/s in a region where the vertical component of the earth’s magnetic field is 0.2x10-4 T. What emf would be developed among the eagles wing tips?
a magnetic field increases from 0 to 0.12 t in 1.8 s. how many turns of wire are needed in a circular coil 14 cm in
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