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The hammer throw is a track-and-field event in which a 7.1-kg ball (the ''hammer''), starting from rest, is whirled around in a circle several times and released. It then moves upward on the familiar curving path of projectile motion. In one throw, the hammer is given a speed of 30.0 m/s. For comparison, a .22 caliber bullet has a mass of 2.6 g and, starting from rest, exits the barrel of a gun with a speed of 409 m/s. Determine the work done to launch the motion of both the hammer and the bullet.
(a) the hammer
(b) the bullet
A 3 kg block is set into motion up an inclined plane of 30 degrees with an initial speed of 8 m/s. what is the frictional force exerted on the block
Due to a temperature difference ?T, heat is conducted through a brass plate that is 0.027 m thick. How thick should the steel plate be so that the same amount of heat per second is conducted through it
An ultracentrifuge having a diameter of 17.3 cm produces an extremely large acceleration of 2.71E+5 m/s2. estimate the angular speed of the centrifuge
you are in a hot-air balloon that relative to the ground has a velocity of 6.28 ms in a direction due east. you see a
a proton moving at a constant velocity of 106 ms enters a region of uniform magnetic field perpendicular to its
A bat moving at 3.4 m/s is chasing a flying insect. The bat emits a 49 kHz chirp and receives back an echo at 49.44 kHz. At what speed is the bat gaining on its prey
An electric field is constant at every point on a square surface that is 0.80 m on a side. Calculate the electric flux E passing through the surface
Some extreme sport enthusiasts have been know to jump off the top of El Capitan, It is very important that the parachute be far away from the cliff when opened. How far is the jumper from the cliff when opening the parachute
An electromagnetic wave has an electric field amplitude of 325 V/m. What is the maximum magnitude of the Poynting vector of this wave
The membrane of the axon of a nerve cell is a thin cylindrical shell of radius r = 10-5 m, length L = 0.42 m, and thickness d = 10-8 m. Find the electric field through the membrane
Sean is running a 100m dash. When the starter's pistol fires, he leaves the starting block and continues speeding up until he reaches his top speed of 11m/s 6s into the race. He holds this speed for 2s and then gradually slows down until he crosse..
A parallel-plate capacitor having square plates 4.50cmcm on each side and 8.00mmmm apart is placed in series with an ac source of angular frequency 650radrad/s, What is the resonance angular frequency of this circuit
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