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A certain stop light stays yellow for 5 seconds before turning red. Suppose that your maximum deceleration from braking is 2 m/sec2. If you approach this light and it turns yellow, you normally have two options: If you are close enough to the light, you can continue on through at a constant speed before it turns red, while if you are far enough from the light, you can put on the brakes and stop before reaching the light. (Disregard the option of speeding up, and assume that reaction time can be ignored.)
However, if you are going faster than a certain critical speed, there are some distances from the light for which you cannot do either (i.e. you are too far to make it through, and yet too close to stop). What is this critical speed?
A red laser pointer with a wavelength of 635 nm is shined on a double slit producing a diffraction pattern on a screen that is 1.75 m behind the double slit. The central maximum of the diffraction pattern has a width of 4.30 cm, and the fourth bri..
A string provides a horizontal force which acts on a 500 N rectangular block at top right-hand corner, find the tension in the string required to start to tip the block over
A bowling ball, which can be treated as a solid sphere with a diameter of 21.6 cm and a weight of 33 kg, The kinetic energy of the bowling ball is
The voltage across a resistor is equal to the product of the current through the resistor and the resistance of the resistor, What is the potential difference of the battery
A softball of mass 0.220kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially at rest. find the velocity of the target ball after the collision
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; the force which generates the motion is located in between the pivot point and the resistance force.what force is ex..
You allow yourself 34min to drive 24mi to the airport, but you're caught in heavy traffic and average only 19mi/h for the first 19min. What must your average speed be on the rest of the trip
Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. compute the distance in which the snowmobile coasts to a halt
A 0.200 kg ball is released fromrest at the top of a 100.0 m tallbuilding. Find the de Broglie wavelength of the ball just before itstrikes the Earth
Avoiding air resistance, what is the magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on the ground? Answer in units of m/s.
A small ball of 53 grams is suspended from a string of length 86 centimeters and whirled in a circle lying in the horizontal plane. If the string makes and angle of 31 degrees with the vertical, find out the centripetal force experienced by the ball...
A 10-kg batch of a food product has a moisture content of 175% dry basis. Calculate the amount of water to be removed from the product to reduce the moisture content to 15% wet basis
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