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(a) If the block reaches the bottom of the slope at 12.0 m/s, what is the average frictional force between the block and the surface of the slope?
(b) What is the kinetic cofficient of friction of the block on the slope?
(c) After reaching the bottom of the slope, the block continues to slide on the level ground of 30.0m before stopping, what is the kinetic coefficent of friction between the level ground and the block?
Find the average force on the driver if the deceleration is accomplished gradually by the application of brakes over a 10.1 s interval
You shine violet light through a diffraction grating (200 lines/cm) on a screen 2.0 m from the grating. The width of the light beam is 0.15 mm. How many slits will the light pass through
Sam pushes a 10.0-kg sack of bread flour on a frictionless horizontal surface with a constant horizontal force of 4.0 N starting from rest. What is the speed of the sack after Sam has pushed it a distance of 20 cm
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A spring has a force constant of 16 N/cm. How much work is needed to extend the spring an additional 7.6 mm
the note middle c on a piano has a frequency of 512 hz in the fundamental tone. suppose that the string that produces
A train at rest emits a sound at a frequency of 1000 Hz. What is the frequency heard by the observer
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A right triangle has a hypotenuse of length 2.90 m, and one of its angles is 38.0°. What are the lengths of the following sides. a: the side opposite the 38.0° angle b: the side adjacent to the 38.0° angle
An engine is built to extract power from the temperature difference in the ocean. what is the maximum theoretical efficiency of such an engine
A 27.4 kg runaway grocery cart runs into a spring with spring constant 387 N/m and compresses it by 75.5 cm. What was the speed of the cart just before it hit the spring
I am rising upward in a hot air balloon. I am holding my coffee container and i accidentally let go of it when I am leaning out and enjoying the view. Whats the greatst height the container achieved in its flight
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