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Question1
A student who weighs 490 N is wearing a backpack that weighs 88 N. The student is standing still on level ground. Give the answers to the following questions in Newton's.
(a) What is magnitude of the net force on the student?
(b) What is magnitude of the contact force on the student by the backpack?
(c) What is magnitude of the contact force on the student by the ground?
Question2
A small rock with mass 0.20 kg is released from rest at point A, that is at the top edge of a large, hemispherical bowl with radius R = 0.50 m. suppose the size of the rock is small compared to R, and assume the rock slides rather than rolling. The work done by friction on the rock when it moves from point A to point B at the bottom of the bowl is -0.22 J. What is a speed of the rock when it reached point B?
LC circuit consists of a 20.0 mH inductor and a 0.750 µF capacitor. find the greatest potential difference across the capacitor
The resultant displacement has a magnitude of 170 cm and is directed at an angle of 65.0° to the positive x axis. Find out the magnitude and direction of the second displacement.
The potential at location A is 376V. A positively charged particle is released there from rest and arrives at location B with a speed vB.
When a thin slab of semiconducting material is illuminated with monochromatic electromagnetic radiation, Determine the energy gap of the semiconductor
A series circuit consists of a 15-%uF057 resistor, a 35-mH inductor, and a 25-%uF06DF capacitor. If the frequency is 100 Hz the power factor is
A 2.45m long copper wire has 1.35V across its ends. Find the electric field strength within the wire
A spaceship moves past you at speed v. You measure the ship to be 287 m long, whereas an astronaut on the ship measures a length of 380 m. Find out v.
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.50 m and 0.98 m, respectively. Calculate the speeds of the tips of both rotors
With the rod initially horizontal, a 44 gm wad of wet putty drops onto one of the balls with a speed of 3.7 m/sec and sticks to it.
question1drop solid sphere of aluminium into a bucket of water sitting on ground. the buoyant force equals weight of
Two in-phase loudspeakers are some distance apart. What is the spacing between points where constructive interference occurs? The speed of sound in air is 343 m/s
Consider the RC-circuit with R = 3 k%u03A9, C = 100 %u03BCF, and E = 12 V and a switch. At t = 0 the capacitor is empty and the switch is closed to the charging begins. Calculate the time constant of the circuit
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