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A person driving her car at 46.0 km/hr approaches an intersection just as the traffic light turns yellow (see figure below). She knows that the yellow light lasts only 1.60 s before turning to red, and she is a distance D = 28.0 m away from the near side of the intersection. If she decides to stop, how far from the intersection will she come to a stop? The intersection is W =11.0 m wide. Her car's maximum deceleration is -5.50 m/s2. Ignore the length of her car and her reaction time. Assume the beginning of the intersection the origin of your x-coordinate and take distances beyond the intersection to be positive and distances before the intersection to be negative. The car can accelerate from 46.0 km/hr to 69.0 km/hr in 6.50 s. How far from the intersection will she be when the light turns red?
A bat at rest sends out ultrasonic sound waves at 50.5 kHz and receives them returned from an object moving directly away from it at 30.5 m/s
A 4-kg block lies on a horizontal table whose coefficient of friction is 0.3. A horizontal rope is redirected by a uniform solid disk (pulley) of mass 2 kg to a mass of 12-kg hanging off the table. What is the angular acceleration of the disk
The period of the simple harmonis oscillator is 2.00 s. When the given clock reads time t= 0.206s, the velocity of the oscillator is -.314 m/s. find the position of the oscillator when t= 5.00s.
An aluminum wire carrying a current of 3.0 A has a cross-sectional area of 2.0 ? 10-6 m2. Find the drift speed of the electrons in the wire
A flower pot on a balcony railing falls to the ground 8.63m below. A cat directly beneath the pot sees it begin to fall. How long does cat have to move.
A tungsten wire has a radius of 0.082 mm and is heated from 20.0 to 1399 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1. How long is the wire
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.05 10-3 g. Find the mass density inside the box
A uniform, solid, right, circular cylinder rolls down an 4.00 m incline without slipping. How fast will the cylinder be rotating at the bottom
During a bad weather day with an atmospheric pressure of 0.9 atm a submarine dives at a depth of 9.3 m.
A pole vaulter is running with a 2.5 kg carbon pole that is 4.5 meters long, holding it level to the ground. Calculate the forces that must be exerted by each of the two hands
A certain lightbulb is rated at 175.0 W when operating at an rms voltage of 120 V. What is the peak voltage applied across the bulb
In this week's experiment, we will accelerate electrons and inject them into magnetic fields generated by Helmholtz coils in the direction perpendicular to the magnetic fields, what is the final speed of the electrons
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