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Solve the following question given below:
Question: You have built a homemade skate board for your nephew out of a plank and a set of wheels. Your nephew speeds up to a final speed of 2 m/s on level ground. Your nephew throws himself backward off the skateboard, kicking the rickety skateboard forward at 7 m/s. Your nephew has a mass of 65 kg and the skateboards mass is 9 kg.
Part A: How fast was your nephew moving when his feet left the skateboard?
Please show work thank you!
In 1.00 second an automatic paintball gun can fire 15 balls, each with a mass of 0.113 g , at a muzzle velocity of 90.0 m/s . Calculate the average recoil force experienced by the player
Three capacitors are connected in series. The equivalent capacitance of this combination is 2.60, What is the third capacitance (in F)
a football punter accelerates a football from rest to a speed of 8 ms during the time in which his toe is in contact
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A bright object and a viewing screen are separated by a distance of 60.5 cm. At what location(s) between the object and the screen should a lens of focal length 12.2 cm be placed in order to produce a crisp image on the screen?
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.50 × 10-10 T. How much energy does this wave carry through the window during a 30 s phone call
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A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 11 N. What is the frequency of the fundamental oscillation
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a fugitive tries to hop on a freight train traveling at a constant speed of 5.0 ms. just as an empty box car passes him
In a hydro-electric power station, water falls through a 75 mpipe at the rate of 1500 kg s^-1 (kilograms per second) How many megawatts of electric power could be produced by the power plant ifit is 80% efficient?
A model rocket is launched straight upward with an initial speed of 49.4 m/s. It accelerates with a constant upward acceleration of 2.25 m/s2 until its engines stop at an altitude of 187 meter. Compute the maximum height reached by the rocket
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