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A typical capacitor in an MP3 player has C = 5 ?F. If a charge ±37 ?C is placed on the plates, what is the voltage across the capacitor?
A ranger in a national park is driving at 41km/h when a deer jumps onto the road 66 m ahead of the vehicle. After a reaction time of t s, ranger applies the brakes to produce an acceleration of -3.20m/s2. What is the maximum reaction time allowed ..
An 80 g, 35 cm long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 g ball of clay travelling horizontally at 2.50 m/s hits and sticks to the very bottom tip of the rod.
What is the terminal speed at which the bar falls? Imagine the bar remains horizontal and in contact with the rods at all times.
A string requires a 186 N force in order to break. A 1.50 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.90 m. What is the highest speed that this mass can be whirled without breaking the string.
Illustrate a new gravitational potential energy
A car is travelling at 26 m/s when the driver spots a large pothole in road a distance 34 m ahead. She at once applies her brakes. If her acceleration is -7.5 m/s2, does she manage to stop before reaching the pothole.
An air-track glider attached to a spring oscillates between the 10.0 {rm cm} mark and the 58.0 {rm cm} mark on the track. The glider completes 15.0 oscillations in 35.0 {rm s}. What are the (a) period, (b) frequency, (c) amplitude, and (d) highest..
A radio controlled car increases its kinetic energy from 4J to 12J over the distance of 2 m. What was the average net force on the car during this interval.
What is the maximum speed the car can have at point B for the gravitational force to hold it on the track.
A projectile is fired with an initial speed of 68.8 at an angle of 37.8 above the horizontal on a long flat firing range. Find out the maximum height reached by the projectile.
Find the minimum volume of concrete (y = 23.6 kN/m3) needed to keep the gate (1 m wide) in a closed position; l = 2 m. Note the hinge at the bottom of the gate. Explain briefly.
What would be the radius of curvature of the cornea
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