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A football kicker can give the ball an initial speed of 27 m/s. He is 53 m from the goalpost which has a crossbar 3.09 m high.
(a) What is the smallest angle of elevation that he can kick the football and score a field goal?
(b) What is the largest angle of elevation that he can kick the football and score a field goal?
A glass rod is rubbed with a cloth, and the rod is left with a charge of +5.0nC. How many electrons did the cloth gain
A car travels along a certain road at an average speed of 46.51 km/h, Calculate the average speed for the round trip
Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. What is the weight of the landing craft in the vicinity of Callisto's surface
A 92 kg climber rappels down the rope applying friction with figure eight (piece of climbing equipment ) to reduce his his downward acceleration.
A typical GPS (Global Positioning System) satellite orbits at an altitude of 4.40 107 m. Find the orbital period of such a satellite
A crane at a construction site lifts a concrete block with a mass of 440 kg from the ground to the top of a building with a height of 15.0 m
Two positive point charges, each of which has a charge of 4.3E-9 are located at y=+.10m and y+-.10m, What is the direction of this force
A 1.5kg- block of ice is initially at a temperature of -7.0C a)If 2.6×10^5J of heat are added to the ice, Find the amount of ice, if any, that remains
Two red blood cells each have a mass of 9.05 × 10-14 kg and carry a negative charge spread uniformly over their surfaces. What is the maximum accleration of the cells as they move toward each other and just touch
A waiter holds two plates of food in one hand. Hiss forearm has a mass of 2.2 kg and the center of mass of his forearm is located 13 cm from his elbow joint. find the torque produced by the mass of the two plates
A right circular cylinder has radius of 1cm and contains Hg ( d= 13.596 kg/l), Determine length of mercury column and length of water column
A 189g block is launched by compressing a spring of constant k= 200 N/m a distance of 15cm. After launch, where does the block finally come to rest? Measure from the left end of the frictional zone
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