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A 25 kg projectile is fired by accelerating it with anelectro magnetic rail on the earths surface. The rail makes a 30degree angle with the horizontal, and the guns applies a 1250 Nforce on the projectile for a distance of 7.50 m along the rail. (a.) Ignoring air resitance and friction, what it the net work doneon the projectile, by all the forces acting on it, as it moves 7.50m along the rail? (b.) Assuming it started at rest, what is thespeed after it has moved the 7.50 m?
A spaceship of mass 2.20×106 is cruising at a speed of 5.40×106 when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 4.90×105 , is blown straight backward with a speed of 2.40×106 . A second piece, with..
If the golf club is in contact with the ball as it is accelerated over an interval of 1.11 cm, estimate the average force exerted on the ball by the club
You are driving east on 8th Street (Tamiami Trail) at a speed of 32. In the rearview mirror, What is the frequency of the siren
a football player kicks a ball at angle of θ = 45degree above the horizotal. The initial speed of the ball in22m/sec. find the time of the flight between kick off and landing
The air velocity of an airplane is 188 km/hr at an angle of 26.0 degrees north of east. find the speed and direction of the wine
Two microscope slides are placed together but held apart at one end by a thin piece of tin foil. Under mercury green light (546 nm) normally incident on the air film formed between the slides, Determine the thickness of the foil
A 57.0 kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. Calculate the change (?PE = PEf - PE0) in the gravitational potential energy
A hydrogen atom has a radius of about 0.05 nm. estimate the electron's kinetic energy in three dimensions.
The force diagram shown describes the forces acting on the back while bending at the waist in static equilibrium the trunk makes a 60 degree angle with the vertical. hat is the torque equation about point A
An electric kettle of 7.0 Ω resistance containing 500 cm3 of water at 10ºC is connected to the 110 V supply. calculate how long it takes to convert all of the water into steam
An ambulance traveling at 47 m/s approaches a car heading in the same direction at a speed of 31 m/s. At what frequency does the driver of the car hear the siren
An ac generator with a frequency of 1.34 kHz and an rms voltage of 24.2V is connected in series with a 2.00 kohm resistor and a 315 mH inductor. What is the power factor for this circuit? What is the average power consumed by this circuit?
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