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A football player (m=115g) is sitting on the ground. A playerkicks the ball with a force of 36 N. The force acts over a distanceof 25 cm and is along the direction of motion of the soccerball.
A) What is the speed of the ball after being kicked?B)When the ball reaches a height of 6.5m , it has a speed of4.2 m/s. How much work does the non-conservative force of airresistance do on the ball?
A 5 g bullet has a speed of 220 m/s and embeds itself into a 650 g block. What is the speed of the block after the collision
A 245 ball is tied to a string. It is pulled to an angle of 5.20 and released to swing as a pendulum. A student with a stopwatch finds that 10 oscillations take 10.5.
An air conditioning unit keeps a house cool at 68 degrees Fahrenheit when the outsid temperature is 95 degrees Fahrenheit. how much does it exhaust to the outside
suppose a carnot refrigerator is used to cool the interior of a food storage locker from room temperature to 5degc. as
q1. a 80 kg person sits on a 4 kg chair. each leg of the chair makes contact with the floor in a circle that is 1.3 cm
A 130 cm length of string has a mass of 3.5 g. It is stretched with a tension of 5.9 N between fixed supports. (a) What is the wave speed for this string? (b) What is the lowest resonant frequency of this string?
consider a rocket launched from vandenberg afb ca longitude34.6 degrees having an initial velocity of 3 kms in the
a. calculate the debroglie wavelength of a 1000 kg automobile traveling at 100 km per hour.b. calculate the debroglie
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.39? Neglect the mass of the balloon fabric and the basket.
A rapidly spinning paddle wheel raises the temperature of 200mL of water from 21 degrees Celsius to 25 degrees. How much a) work is done and b) heat is transferred in this process
The carts of a roller coaster are traveling 2 m/s over the top of the first hill. what speed will the carts have at the bottom of the hill
What is the current in the wire.
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