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Q1. A 59.0 kg pole vaulter running at 9.5 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.5 m/s and air resistance is disregarded, how high was the jump?
Q2. In a charging process, 5 × 10^13 electrons are removed from one metal sphere and placed on a second sphere. Then the electrical potential energy associated with the two spheres is found to be -0.072 J. firstly, both metal spheres are neutral.
The value of the Coulomb constant is 8.98555 × 109 N • m2/C2 and the charge on an electron is 1.6 × 10-19 C.
What is distance between the two spheres?
A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37 degrees above the horizontal. If the mass of the box and the books is 40 kg, what is the normal force on box? a. 332 N b. 312 N c. 392 N d. 292 N
What is tension in each string
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
What is the reading of spring scale
What is kinetic energy of the shell
What is the angular velocity in rad/s . What is the least pressure obtained inside the bottle? What will happen when this pressure is reached.
He would like a prescription for contact lenses to serve the similar purpose. What is the correct contact lens prescription, in diopters.
What is magnitude of the speed of the boat
A soprano saxophone is an open pipe. If all keys are closed, it is approximately 65 cm long. Using 343 m/s as the speed of sound, find the lowest frequency that can be played on the instrument.
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is originally at rest, then moves at a speed of 0.20 m/s all along the conveyor belt. What is the instantaneous power produced by this machine..
If the mass of both weights is 150 gm, the first mass is located 30 north of east, the second mass is located 30 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? Suppose the transducer h..
How greatly time elapses before the compass hits the ground
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