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A car driving at 20 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. The tires screech as the car decelerates at a constant rate. When the car reaches 3/6 of the distance to the white line, the driver is confident that the speed of the car is under control and eases off the brake pedal. The car decelerates at 1/5 the rate for the remaining 3/6 of the distance and stops on the white line.
How fast was the car going when the driver changed the rate of deceleration?
A 2.45m long copper wire has 1.35V across its ends. Find the electric field strength within the wire
An object moves with constant acceleration 5.00 m/s2 and over a time interval reaches a final velocity of 11.2 m/s. (a) If its initial velocity is 5.6 m/s, what is its displacement during the time interval?
A converging lens of focal length 7.930cm is 16.6 cm to the left of a diverging lens of focal length -6.0cm. A coin is placed 12.60cm to the left of the converging lens. Determine the location of the coin's final image.
Determine the vertical component. when would a microphone at the other end first detect a disturbance.
Two large, parallel, conducting plates are 21cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 4.1 x10-15 N acts on an electron placed anywhere between the two plates.
Explain how much force must you exert to keep the pole motionless and horizontal?
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of81.0m/sat ground level. What is its velocity just before it hits the ground
two object are connected by a massless string that passes over an ideal pulley. calculate the two components of the force of weight for the object on the incline plane
what is the ratio of the amplitude of damped oscillations.
The temperature at Furnace Creek in Death Valley reached 134°F on July 10, 1913. What is the speed of sound in air
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
Consider a three dimensional rectangular infinite potential well with sides of length L, 2L and 3L. What is the energy of the first excited state relative to the energy of the ground state
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