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A point of a body or a system of particles which moves as if the total mass of the body or the system of particles were concentrated there and all the applied forces were acting at that point is called as?
A stainless steel orthodontic wire is applied to a tooth, as shown in the figure above. The wire has an unstretched length of 2.7 cm and a diameter of 0.2 mm. What is the tension in the wire
A 6500 kg helicopter accelerates upward at 0.59 m/s2 while lifting a 1210 kg car. What is the lift force exerted by the air on the rotors?
How much energy does a 100 watt light bulb use in 1 hour? Express your answer in joules Also find how much money it costs if electricity sells for 10 cents per kW-h.
A 1-kg steel ball and a 2-m cord of negligible mass make up asimple pendulum that can pivot without friction about a pointabove the system. What is the velocity of the block just after impact
if a large enough electric field is applied even an insulator will conduct an electric current as is evident in
a person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 28.0 m. she pushes in a direction
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 1.69 km away. What distance did the dog run
A disk with moment of inertia I1 rotates about a frictionless vertical axle with angular speed wi. find the ratio of the final to the initial rotational energy
You create a plot of T2 (in s2) vs. L (in m) and the linear fit of your graph gives a slope of 3.7084 ± 0.0062. What is the value of the local gravitational constant, g
A tennis ball of mass = 0.068kg and speed = 21m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degrees. What is the magnitude of the impulse given to the ball
A cannon fires a cannonball from the top of a wall at a speed of 23.49 m/s and an angle of 30.95 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
one mole of an ideal gas at 1 atm and 0 C is compressed isothermally from 50 L to 20 L. What is the change of internal energy for this gas
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