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A horizontal force of 109 Newton pushes an 8 kilogram block up a frictionless incline that creates an angle of 23 degree with the horizontal.
(a) Find the normal force that the incline exerts on block?
N
(b) Find what is the acceleration of the block? (Hint: assume up the block as the positive direction.)
m/s2
A pendulum consists of a .155 kilograms ball hanging from a light thread, find the angle the pendulum string makes with the Vertical when the system is in equilibrium
In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 10.1 m to a store. At what angle is the escalator inclined above the horizontal
A machinist turns the power on to a grinding wheel, at rest, at time t=0 s. What is the angular velocity in the time interval from t=0 to t=25s
It was a dark and stormy night, when suddenly you saw a flash of lightning. Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt?
A wooden plank is raised at one end to make an angle of 30° to horizontal. determine the rate of acceleration down the incline
The average output power of a cellular phone, which can be treated as a point of E-M waves, is 1.0W when it is "ON". Estimate the intensity of the phone's E-M waves in your brain
An all-electric car (not a hybrid) is designed to run from a bank of 12.0-V batteries with total energy storage of 2.10 X 10^7 J. How far can the car travel before it is "out of juice"
An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 1.11 eV. What is the width of the square well
The steel I-beam in the drawing has a weight of 3.51 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends
The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.47 rad/s2. Calculate the total angle through which the wheel has turned
Two people carry a heavy electric motor by placing it on a light board 2.90m long. One person lifts at one end with a force of 370N, What is the weight of the motor
Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
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