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Q. A uniform diving board, of length "(X)" m and weight 400 N, is supported at two points; one support is located "(3X/4)" from the end of the board and the second is at "(X/4)" from the end. What are the forces acting on the board due to the two supports when a diver of mass 75 kg stands at the end of the board over the water? Assume that these forces are vertical.
Q. An electric field of intensity 2.5 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.70 m long if the following conditions are true:
(a) The plane is parallel to the yz-plane.(b) The plane is parallel to the xy-plane.(c) The plane contains the y-axis, and its normal makes an angle of 45° with the x-axis.
Television sets sometimes use a rabbit ears antenna to the right. A rabbit-ears antenna consists of a pair of metal rods. The length of each rod can be adjusted to one quarter of the wavelength of an electromagnetic wave whos frequency is 125 Mhz...
A flight attendant pulls hero 70 N flight bag a distance of 253 m along a level airport floor at a constant velocity. The force she exerts is 40N at an angle of 52.0 degrees above the horizontal.
A 5.00 x 10^4 kg space probe is travelling at a speed of 14000 m/s through deep space. Retrorockets are fired along the line of motion to decrease the probe's speed. The retrorockets generate a force of 4.00 x 10^5 N over a distance of 2600 km. What ..
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
Determine the tension in each string
A pulley 18 in diameter is free to rotate about the horizontal axle. A 220 mass and a 420 mass are tied to either end of a massless string, and string is hung over the pulley.
A cylinderical water tank of radius 10ft and height 30ft is half filled with water. How much work is essential to pump all of the water out through a hole in the top of tank.
A physics student in a hot air balloon ascends vertically at constant speed. suppose the following four forces that arise in this situation.
Obtain an expression for the velocity
Find out d, the distance between the photogates, using the times and glider length. There is two ways to find this for the up and down directions.
The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
Two masses traveling at the same speed v0 collide head on. Nothing is known about collision other than that it is not completely inelastic.
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