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A skateboarder shoots off a ramp with a velocity of 7.4 m/s,directed at an angle of 55° above the horizontal. The end ofthe ramp is 1.4 m above the ground. Let the x axis beparallel to the ground, the +y direction be verticallyupward, and take as the origin the point on the ground directlybelow the top of the ramp. (a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highestpoint, how far is this point horizontally from the end of the ramp?
A certain freely falling object requires 1.7s to travel the last 37m before it hits the ground. From what height above ground did it fall.
he sun radiate a power of 3.9 x 10 ^ 26 watt in space . The earth orbits around the sun of radius of 1.5 x 10 ^11 m, What is the intensity of sun light on the noon time at the equation on the winter days
Two 2.30 cm x 2.30 cm plates that form a parallel-plate capacitor are charged to +- 0.714nC. Part A What is the potential difference across the capacitor if the spacing between the plates is 1.00mm? Part B What is the potential difference across t..
A wire of resistance 5.4 ? is connected to a battery whose emf ? is 2.0 V and whose internal resistance is 1.0 ?. In 1.8 min, how much energy is dissipated as thermal energy in the wire
A 62-kg astronaut is in space, far from any objects that would exert a significant gravitational force on him. How fast is the astronaut moving after he throws the mallet
What are the lowest and the highest frequencies. calculate the acceleration of the crate.
A right circular cylinder has radius of 1cm and contains Hg ( d= 13.596 kg/l), Determine length of mercury column and length of water column
Finally a thin rod of mass 7 kg is added between the two particles Since the particles are moving perpendicular to the line separating them, What the angular frequency of rotation of the rod + particles system
An aluminum rod is 24.0 cm long at 20°C and has a mass of 350 g. If 13,500 J of energy is added to the rod by heat, what is the change in length of the rod
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 14.0 m/s at an angle 61.0 degrees; How high above the ground will the ball be when it gets to Julie
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
A kettle containing 9kg of water reached its boiling point. How much energy, in joules, is required to boil the kettle dry
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