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A catcher catches a fastball going 95mi/hr and recoils 12cm while stopping the ball in 0.005s. (mass of the ball is 280g).
a) What was the magnitude and direction of the change in momentum of the ball?
b) What was the average force the ball exerts on the hand & glove?
A physics book slides off a horizontal tabletop with a speed of 2.70m/s . It strikes the floor in 0.350s. Find the direction of book's velocity, just before the book reaches the floor
A car is traveling at 27 m/s when the driver spots a large pothole in the road a distance 44 m ahead. She immediately applies her brakes. If her acceleration is -9.7 m/s2, does she arrange to stop before reaching the pothole.
Imagine there has been a drastic rise in food-borne illness in the city in which you live. The public lacks the knowledge about proper food safety to stop these problems and they also do not know how to find precise nutritional information to educ..
A 1348 kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 13.6 s, then the motor stops. The rocket altitude 29.6 s after launch is 2091 m. You can avoid any effects of air resistance. What was the rock..
In a television set, electrons are accelerated from rest through a potential difference of 22 kV. Find the magnitude of the maximum magnetic force
In an RLC circuit, the following three elements are connected in series: a resistor of 31.0 ohm, a 22.2-mH inductor, and a 0.390-µF capacitor. Find the power factor for the RLC series circuit
A 40.0 cm long organ pipe is filled with air at 0 degrees C and is open at both ends. What is the beat frequency between the fundamental frequencies of the two organ pipes
John is sitting ( at rest) at the top of a slide that is inclined 25 deg with respect to the horizontal. how much does the thermal energy increase during John's trip down the slide
a rifle with a mass of 2.8 kg fired a bullet with a mass of 0.003 kg. the bullet moves with a muzzle velocity of 420 m/s after the rifle is fired
A star is moving away from Earth at a speed of 2.3x10^8 m/s. find the wavelength as measured by an Earth observer
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
Find the range of visible wavelengths of light in Plexiglas. (Assume that the range of visible wavelengths of light in air is 380 - 760 nm.)
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