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A 4.20–kg block is set into motion up an inclined plane with an initial speed of vi = 7.40 m/s (see figure below). The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of ? = 30.0° to the horizontal.(a) For this motion, determine the change in the block's kinetic energy.J(b) For this motion, determine the change in potential energy of the block–Earth system.J(c) Determine the friction force exerted on the block (assumed to be constant).N(d) What is the coefficient of kinetic friction?
One end of a horizontal rope is attached to a prong of an electrically driven tuning fork that vibrates at a frequency 125Hz, What is the speed of a transverse wave on the rope
A long solenoid (cross-sectional area = 0.85 x 10-6 m2, number of turns per unit length = 1878 turns/m) is bent into a circular shape so it looks like a doughnut, Find the emf induced in the toroid
A solid sphere of mass 2.5 Kg and a radius .15m starts from rest at the top of the ramp inclined 15 degrees, and rolls to the bottom without slipping. What is the total kinetic energy of the sphere
A motorcycle has a constant speed of 25.0 m/s as it passes over the top of a hill whose radius of curvature is 118 m, Find the centripetal force that acts on the cycle
A girl rides an escalator that moves her upward at a constant speed. As the girl rises, how do her gravitational energy and kinetic energy change.
A drinking fountain shoots water out from a height of 3.5cm above its basin. Determine the time a single drop spends in the air
A short time later, all of the charge has left the capacitor and the current flowing through the inductor has reached its maximum value. What is this current
A 14.8cm diameter loop of wire is initially oriented perpendicular to a 1.3T magnetic field, What is the average induced emf in the loop
q1. a thunderstorm drops 6.0cm of rain on a city that covers an area of 33 km by 45 km. approximation the number of
If instead the second disk is set spinning at 580 rpm in the direction opposite the first disk's rotation, what is the angular speed after coupling
A helicopter is ascending vertically with a speed of 5.02m/s. At a height of 140m above the Earth, a package is dropped from the window. How much time does it take for the package to reach ground.
4 moles of an ideal gas have an initial temperature of 127 C. The temperature of the gas is kept constant and the volume is increases until the pressure drops to 40.0% of its original value. Calculate the heat added to the gas
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