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A rifle is fired horizontally. The buillet is found to havetraveled 200 meters. The rifle barrel is 1.90 meters from theground. Disregarding air friction, at what speed must the bullethave been traveling as it left the barrel?
A room measures 3.0 m by 4.5 m by 6.0 m. If the heating and air-conditioning ducts to and from the room are circular with diameter of 0.30 m, WHat is the necessary flow speed in the duct
A rock is tossed straight up with a speed of 24 m/s. When it returns, it falls into a hole 13 m deep. find the rock's velocity as it hits the bottom of the hole
Two ice skaters, with masses of 50.0kg and 65.0kg , are at the center of a 40.0m -diameter circular rink. how long does the lighter skater take to reach the edge
An underwater scuba diver sees the Sun at an apparent angle of 26? from the vertical. What is the Sun's angle of inclination
A car moves horizontally with a constant acceleration of 3 m/s2. A ball is suspended by a string from the ceiling of the car; What angle does the string make with the vertical
A meter stick with a mass of 0.159kg is pivoted about one end so it can rotate without friction about a horizontal axis. Calculate the angular speed of the stick
A particle travels 19 times around a 10-cm radius circle in 36 seconds. What is the average speed (in m/s) of the particle
A cylinder of brass has a diameter of 3mm and a length of 100mm. What is the stress in the cylinder
A bungee cord is stretched between two poles with a force of 434 N. What is the velocity of a wave on this bungee cord
A 800 kg car is travelling forwards at + 25 m s?1 along a level road. What is the acceleration during skidding
A cannonball shot with the initial velocity of 129 m/s at an angle of 36° follows a parabolic path and hits a balloon at the top of its trajectory. Neglect air resistance, how fast is the cannonball going as it hits the balloon.
An electric fan is turned off, and its angular velocity decreases uniformly from 500 rev/min to 200 rev/min in a time interval of length 4.00 s. Find the number of revolutions made by the motor in the time interval of length 4.00s
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