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A rail car that weighs 28 N is accelerated at 3.6 m/s/s for 2.2 seconds. How much work is done on the rail car? The acceleration is constant. Hint: this is a multiple step problem in which you must derive the variables needed to solve the problem in step one and then apply those values to the final solution of the problem in the last step.
A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string.
A gasoline engine has a power output of 155kW (about 2.08×105hp ), Its thermal efficiency is 26.0%, How much heat must be supplied to the engine per second
A 40.0 kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 18.0 m, What is the centripedal acceleration of the child
Then, calculate the exact number of protons and express the answer in scientific notation with the correct number of significant digits.
A block of weight 3.9N is launched up a 30%u2218inclined plane 2.35m long by a spring with k = 2.35 N/m and maximum compression 0.10m. How much kinetic energy does it have there
A handball is projected at an angle of 30 deg with the horizontal from a 20 m tower with an initial vertical velocity of 10 m/sec, find the Resultant velocity at landing
The period of the moon (the time for a complete revolution) is 27.32 days, Determine the angular velocity of the moon
A certain star is 14 million light-years from Earth. The intensity of the light that reaches Earth from the star is 4.00 x 10-21 W/m2. At what rate does the star radiate EM energy.
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
White light containing wavelengths from 400 nm to 750 nm falls on a grating with 7000 lines/cm. How wide is the first-order spectrum on a screen 2.10 m away.
A light wave travels from point A to point B in vacuum. hat is the difference between the number of waves between A and B with and without the glass plate in place
Assume that there is a very beautiful ornate crown, supposedly made of solid gold, how would you determine its density
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