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A model train moves along horizontal circular track with radius of 0.5 m. Starting from rest, the train accelerates at 0.2 m/s2. Describe at is the angular acceleration (in rad/s2) of the train?
A long, uniform rope with amass of 0.130 kg per meter lies on the ground. You grab oneend of the rope and lift it at the constant rate of 1.40m/s.Calculate the upward force you must exert at the moment when the top end of the rope is 0.510m above the..
n a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.6 ? 10-17 N during the first 1.9 cm of the tube's length, Find the speed of the electrons when they hit the screen
A tennis ball is struck at the base line of the court, 11.5 m from the net. The ball is given an initialvelocity with a horizontal component equal to 27.0 m/s at an initial elevation of 1.21 m.
Laser light of wavelength 635 nm is incident upon two narrow slits separated by .14 mm. On a screen 4.1 m beyond the slits, how far apart are the interference fringes
A satellite of Mars, called Phobos, has an orbital radius of 9.4 106 m and a period of 2.8 104 s. Assuming the orbit is circular, determine the mass of Mars
The burning of gasoline in a car releases about 3 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is an efficiency of the engine under those conditions.
An object attached to a horizontal spring is oscillating backand forth along a frictionless surface. The maximum speed is 1.25m/s, and its maximum acceleration is 6.89 m/s2 .
In the figure below, a battery of potential difference V = 13 V is connected to a resistive strip of resistanceR = 7.0 Ω. When an electron moves through the stripfrom one end to the other, (a) in which directionin the figure does the electron move..
when baseball outfielders throw the ball they usually allow it to take one bounce on the theory that the ball arrives
A 0.105-kg ball is dropped from rest. If magnitude of the ball's momentum is 0.790 kg · m/s just before it lands on the ground, from what height was it dropped.
q1. an iron bolt of mass 63.4 g hangs from a string 32.6 cm long. the top end of the string is fixed. without touching
An ice cube is placed in a microwave oven. Suppose the ovendelivers 97 W of power to the ice cubeand that it takes 32170 J to melt it. How long does it take for the ice cube to melt
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