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1. A 10 N object rests on a 10° incline. What is the normalforce? What is the parallel force? A 10 kg object rests on a10° incline. What are the normal and the parallel forces?
2. What force is needed to push a 15 N object up a20° incline at constant speed when the coefficient offriction is 0.30?
At rest, a car's horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 417 Hz. Is the cyclist ahead of or behind th..
A prescription for a corrective lens calls for +1.50D. The lensmaker grinds the lens from a "blank" with n = 1.56 and a preformed convex front surface of radius of curvature of 40.0 cm. What should be the radius of curvature of the other surface?
Two small, positively charged spheres have a combined charge of 5.02×10-5 C. what is the charge on the sphere with the smaller charge
The flywheel of an engine has a moment of inertia 3.00 {rm kg} cdot {rm m} ^ {2} about its rotation axis. What is its final kinetic energy.
A spring is hanging from the ceiling. Attaching a 480 g mass to the spring causes it to stretch 21.0 cm in order to come to equilibrium. a. What is the spring constant? b. From equilibrium, the mass is pulled down 10 cm and released.
An alpha particle is a helium nucleus that consists of two protonsbound with two neutrons. An alpha particle moving through aperpendicular magnetic field of 1.2 Texperiences an acceleration of 2075m/s2.
An ice hockey puck is sliding along the vertical wall as shown on the picture (top view shown). Puck is moving in the horizontal plane only. Find the velocity of the puck at that point
A small car with mass 0.690 travels at constant speed on the inside of the track that is a vertical circle with radius 5.00. If the normal force exerted by the track on the car when it is at the top of the track (point) is 6.00, what is the normal fo..
A simple harmonic oscillator takes 12 s to undergo 5 complete vibrations. Find (a) the period of its motion, (b) the frequency in hertz and (c) the angular frequency in radians per second.
A runner moving at a constant speed of 11.7 m/s rounds a curve of radius 4.10 m. calculate the acceleration of the runner. (State the magnitude of this acceleration.)
There is evidence that elephants communicate via infrasound,generating rumbling vocalizations as low as 14 hz that can travelup to 10 km. The intensity level of these sounds can reach98 dB, measured a distance of 4.5 m from the source
A golf ball is driven from a level fairway. At a time of 4.54 slater, the ball is traveling downward with a velocity of 42.4 m/sat an angle of 20.4° below the horizontal. Neglecting airresistance, calculate the initial velocity (magnitude anddirec..
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