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Two blocks are placed on a frictionless inclined plane as shown in the figure. There is friction between the blocks. The coefficient of kinetic friction is Uk= 0.14 and that of static friction is Us=0.55. A string is tied to the lower block, and the blocks are pulled up the plane with a force P= 31.5 N due to which the blocks accelerate with an acceleration of a= 0.667 m/s2. If the block m1=2kg does not slip on the block m2=5 kg while the blocks are accelerating together, what will be the magnitude of static friction force between the blocks m1 and m2?
A 1.2m×1.2m×1.2m cube of nitrogen gas is at 20oC and 1.1 atm. Estimate the number of molecules in the cube with a speed between 700 m/s and 1000 m/s
When venturing forth on Planet X, you throw a 5.01 kg rock upward at 12.6 m/s, What does the rock weigh on planet X
A truck is moving at 150 km/h and approaches a stationary policecar that has a radar speed detector operating at 15 GHz. What wil lbe the frequency change found by the speed detector?
a simple camera telephoto lens consists of two lenses. the objective lens has a focal length of f1 39 cm. precisely
Can sound travel through- (a) iron (b) water. Can sound travel through vacuum.Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).Name one solid, one liquid and one gas through which sound c..
A copper block is removed from a 300^0 C oven and dropped into 1 L of water at 20.0^0 C. The water quickly reaches 25.5^0 C and after that remains at that temperature. What is the mass of copper block.
Mario weighs 650N and the Hour hand weighs 5000N and is uniform in density. The time is 3pm. The Hour hand is 5 meters long. What is the net Torque around the pin that attaches the hour hand to the clock face?
In the figure below, water flows through a horizontal pipe, and then out into the atmosphere at a speed of v1 = 13 m/s. What is the gauge pressure in the left section of the pipe
A uniform rope of uniform weight W hangs between two trees. The ends of the rope are the same height and they each make and angle theta with the trees. What is the tension at either end of the rope. Find the tension at the middle of the rope.
Two point charges, Q 1 = -2.0 μ C and Q 2 = +2.0 μ C, are placed as shown. In Fig. 21.2b, the x-component of the electric field, at the origin O, is closest to:
The wave function for a linearly polorized wave on a taut string is: y(x,y)=Asin(wt - kx + phi), where A =0.4m, w=3.2s^-1, k=8.1m^-1, phi = 0.49, t is in seconds and x and y are in meters. What is the speed of the wave in m/s?
an electron in an x-ray machine is accelerated through a potential difference of 1.00 times 104 v before it hits the
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