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The electric motor of a model train accelerates the train from rest to 0.640 m/s in 21.0 milliseconds. The total mass of the train is 875 gram. Obtain the average power delivered to the train during the acceleration.
a proton and an electron are separated by 3.5 nm, what is the magnitude of the force on the electron and proton
A violin string vibrates at 264 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end
A bowling ball of mass 2.7 kg and radius 9.5 cm rolls from rest, What is the speed of the ball at the bottom of the incline
a turntable 1.50m in diameter rotates at 80.0rpm. two speakers each giving off sound of wavelength 30.7cm are attached
A human cannon ball is launched at 25.0 m/s at an angle of 30.0 degrees from horizontal. What is the velocity of the human after 0.540 seconds in terms of i and j
An 900 kg purple pickup truck tows a small 200 kg trailer using a relatively lightweight tow rope as shown in the animation. What is magnitude of the net force on the trailer
In order to get that pesky pig you launch a bird at an angle large enough to pass over the barrier. The pig is 80m from the launching point and the barrier is 30m from the launching point. What is the initial horizontal speed
A test rocket is fired vertically upward from a well. A catapult gives it an initial velocity of 79.5 m/s at ground level. Subsequently, its engines fire and it accelerates upward at 4.10 until it reaches an altitude of 920 m. At that point its engin..
For someone who chooses y=0 to be 5 meteres above the ground and up as positive, what will he get for the potential energy
A spring-loaded dart gun is utilized to shoot a dart straight up into the air, and the dart reaches a maximum height of 24 meters. The same dart is shot up a second time from the similar gun, however this time the spring is compressed only half as fa..
If the voltage source remains connected to the capacitor, but the air is replaced by a layer of plastic with dielectric constant 2.6. Find what energy stored in the new capacitor
A kangaroo is capable of jumping to a height of 2.62 m. Determine the takeoff speed of the kangaroo
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