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A tennis player swings her 1200 g racket with a speed of 10.9 m/s. She hits a 60 g tennis ball that was approaching her at a speed of 18.4 m/s. The ball rebounds at 41.8 m/s. How fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.
If the tennis ball and racket are in contact for 8.12 ms, what is the average force that the racket exerts on the ball? How does this compare to the gravitational force on the ball?
A five-slit system with 8.2 slit spacing is illuminated with 635nm light. Find the angular positions of the first two maxima
question a force f 10i 9j 12k acts on a body mass of 100 grams. if the displacement of the object is d 5i 4j where
A friend advised the owner of the bowl to keep it out of direct sunlight to avoid blinding the fish, which might swim into the focal point of the parallel rays from the sun. Is the focal point actually within the bowl
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Imagine the speed quoted is that of the end of the rod.
Racing drivers like to warm up the tyres of their car as soon as possible. One reason is that warm tyres grip the road better but the temperature also affects the pressure of the air into he tyres.
A student throws a set of keys 4.4m up to friend in window. the friend catches the keys 1.7s later. what is the intial velocity
a 45-kg crate is placed on an inclined ramp. when the angle the ramp makes with the horizontal is increased to 30 ?
A 9 turn coil 1.80 in diameter is rotated at 11 about an axis perpendicular to a uniform magnetic field. A voltmeter connected to the coil through rotating contacts reads a peak value of 340.
Take element Z = 39 from the periodic table. Ionize it 38 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
a football player kicks a ball at angle of θ = 45degree above the horizotal. The initial speed of the ball in22m/sec. find the time of the flight between kick off and landing
What is modify in frequency ff - fi
Sound from the siren of an emergency vehicle has a frequency of 750.0 Hz and moves with a velocity of 343.0 m/s. What is the distance from one condensation to the next
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