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A 1.5 kg ball is thrown straight up with aninitial speed of 12m/s. What will be the potential energy of the ball when it reaches its max. height?
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Problem: An athlete performing a long jump leaves the ground at a 28.2 degree angle and lands 7.67 m away. A) What was the takeoff speed? B) If this speed were increased by just 5.0%, how much longer would the jump be?
Question: Storm clouds build up large negative charges, as described in the chapter. The charges dwell in charge centers, regions of concentrated charge. Suppose a cloud has -25 C in a 1.0-km-diameter spherical charge ce ...
Question: A picture frame hung against a wall is suspended by two wires attached to its upper corners Part A: If the two wires make the same angle with the vertical, what must this angle be if the tension in each wire is ...
Question: A skydiver has his parachute open and is floating downward through the air at a constant speed. Identify all the forces acting on the system skydiver-parachute. Check all that apply. Weight, w? Normal force, n? ...
One cubic meter (1.00m^3) of concrete has a mass of 2.30E+3kg, and 1.00m^3 of copper has a mass of 8.92E+3kg. Find the radius of an concrete sphere whose mass is the same as that of an copper sphere of radius 1.28cm?
Question: For this problem, take the distance from the Earth to the Sun to be 1.5 x 10 11 m and the radius of the Earth to be 6.38 x 06m. A) Using the fact that the earth orbits the Sun once per year, calculate the Earth ...
Question: A proton with an initial speed of 800000 m/s is brought to rest by an electric field. Part A- Did the proton move into a region of higher potential or lower potential? Part B - What was the potential difference ...
A clock is set against an accurate standard and 30 days later is found to be in error by 12 seconds. What is the percentage of error in its time keeping?
Question: A simple pendulum oscillates with frequency f. (a) What is its frequency if the entire pendulum accelerates at 3/4g upward? (b) What is its frequency if accelerates at 0.75g downward? The response must be typed ...
Calculate the momentum of a 2100 kg elephant charging a hunter at a speed of 7.50 m/s. kg·m/s Compare the elephant's momentum with that of a 0.0400 kg bullet fired at a speed of 600 m/s. (momentum of elephant / momentum ...
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