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A baseball has mass 0.145 kg.
a) If the velocity of a pitched ball has a magnitude of 50.0 m/s and the batted ball's velocity is 60.0 m/s in the opposite direction, find the magnitude of the change in momentum of the ball.
b) Find the magnitude of the impulse applied to it by the bat.
c) If the ball remains in contact with the bat for 3.00 ms, find the magnitude of the average force applied by the bat.
Two cars travel in the same direction along a straight highway, one at a constant speed of 55 mi/h and the other at 70 mi/h. How far must the faster car travel before it has a 15-min lead on the slower car
In the figure, a block of mass m = 12 kg is released from rest on a frictionless incline of angle ? = 26°. Below the block is a spring that can be compressed 2.8 cm by a force of 330 N. The block momentarily stops when it compresses the spring by 6.9..
a person who weighs 641 n is riding a 94.0 n mountain bike. suppose the entire weight of the rider and bike is
A thin transparent film has an index of refraction of 1.57. It consists of a flat plate with air on both sides of the film. Determine the minimum thickness of the plate
Consider an old-fashion bicycle with a small wheel of radius 0.25 m and a large wheel of radius 0.86 m. Find the total distance traveled by the rider
How much Power does it take to accelerate the 70,000 lb rail car from rest to 10mph in 20 feet with 1ft dia. wheels.
A 7.00×10-1 H coil with a resistance of 1.62×101 Ohm is in series with a 3.01×102 Ohm resistor. find the rms value of the potential difference across the resistor
An electron is released to accelerate from point 1 to point 2 in a potential region. The electric potentials at these points are V1 = -35 V and V2 = +200 V. Calculate the change in potential energy of this electron
Sunlight, with an intensity of 681 W/m2, strikes a flat collecting surface perpendicularly and is totally absorbed. What is the force in micronewtons that acts on the surface
a microscope has an objective lens with an aperture diameter of .60 cm. a monochromatic light source of wavelength 580
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. What is the total time the blue car is moving
A small sphere of charge q1 = 0.872 µC hangs from the end of a spring. When another small sphere of charge q2 = -0.642 µC is held beneath the first sphere, the spring stretches by d = 3.57 cm from its original length.
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