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a. If a dog on a lead is held at 45° to the horizontal and exerts a pulling force of 180N between the dog and its owner, what are the horizontal and vertical components of the force?
b. A breakdown truck has to tow away a lorry. If the tension in the cable is 2500N, and if the cable makes a 55° angle with the horizontal, what are the horizontal and vertical components of the force?
Calculate the radius of an electron's orbit when it moves perpendicular to a magnetic field of 0.52 T with a speed of 6.15 x 105 m/s
What is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph and an initial angle of 42.8o with respect to the horizontal
That one coil has twice the number of turns in the other, calculate the inductance of each coil. Neglect leakage.
Energy Budget and Habitability
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 rpm in 9.5 s. What force is required at the edge
Calculate the potential energy, per ion, for an infinite 1D ionic crystal with separation a; that is, a row of equally spaced charges of magnitude e and alternating sign
q1. a planet of mass 8 times 1024 kg is at location lsaquo -4 times 1011 7 times 1011 0 rsaquo m. a star of mass 7
The pilot hits the throttle when the plane is flying at 54.2 m/s and maintains maximum power for 3.4 seconds.
In a certain particle accelerator, protons travel around a circular path of diameter D in an evacuated chamber, What is the mean free path of the gas molecules
Coherent light with wavelength 600 nm passes through two very narrow slits and the interference pattern is observed on a screen 5.00 m from the slits. The first-order bright fringe is at 4.74 mm from the center of the central bright fringe. For what ..
a ball (mass=m) moving in the positive x direction with speed v collides with a block (mass=M) initially at rest, compute the mass of the block
Two different simple harmonic oscillators have the same natural frequency (f=2.60 Hz) when they are on the surface of the Earth. what is the new frequency of the pendulum
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