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a person who weighs 800 N is squatting on a scale. Suddenly he stars jumping, extending his legs as quickly as possible, so that he can ump into the air. as the person is in the process of jumping (accelerating upward) the reading of the scale is A. greater than 800 N B. equal to 800 N C. less than 800 N
A pendulum is 1.20 metres long. What is the speed of the bob when it passes by its equalibrium position if it is pulled aside until it makes an angle of 25 degrees to vertical.
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
A vertical container with base area measuring 16 cm by 18 cm is being filled with identical pieces of candy, each with a volume of 50 mm3 and a mass of 0.020g. Suppose that the volume of the empty spaces between candies is negligible.
A stockroom worker pushes a box with a mass 11.2kg on a horizontal surface with a constant speed of 3.50m/s. coefficient of kinetic friction between the box and the surface is 0.20.
Two 10 cm long thin glass rods uniformly charged to + 10;{rm nC} are placed side by side, 4cm apart. What are the electric field strengths E_1, E_2, and E_3 at distances 1.0 cm, 2cm, and 3cm to the right of the rod on the left, along line connecti..
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of -0.6020 N when separated by 50 cm, center-to-center.
The street automobile with the greatest acceleration is the Tempest. It has an acceleration of 6.89m/s2. Suppose the car accelerates from the rest to a final speed of 96.5km/h. How long does it take Tempest to reach this speed.
An airplane flies due south at 190-km/h relative to the air. There is a wind blowing at 73.0 km/h to the east relative to the ground. What are the plane's speed and direction relative to the ground.
What are the direction and magnitude of the magnetic force the field exerts on the proton.
An airplane with a wing span of L = 27m flies horizontally at a location where the vertical component of the Earth's magnetic field is B = 6.0 x10 -5 T.
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
Which kinetic energy equals to rotational motion
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