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A football player kicks a 0.41 kilogram football initially at rest; and the ball flies through the air. If the kicker's foot was in contact with the ball for 0.051 second and he ball's initial speed after the collision is 21m/s, find the magnitude of the average force on the football?
A bob of mass(m) is suspended from a fixed point with a massless string of length(L) (i.e., it is a pendulum). You are to investigate the motion in which the string moves in a cone with half-angleθ.
A 92 kg man standing on a surface of negligible friction shoves a 73 g stone lying at his feet, giving it a velocity of 4.0 m/s. What velocity does the man acquire as a result.
White light illuminates an oil film on water. Viewing it directly from above, it looks red. What is the refractive index of the oil
A 1650-kg car is travelling at 31.2 m/s. How fast must a 91.0-kg bicycle and rider be travelling to have the similar kinetic energy as the car.
A solenoid inductor has an emf of 0.90V when the current through it changes at the rate 10.0 A/s. How many turns does the inductor have
Two figure skaters, one weighing 625N and the other 775N , push off against each other on very smooth ice. If the heavier skater travels at 1.60m/s , how fast will the lighter one travel?
Suppose that 36 g ofHg(mercury) at -39°C are dropped into a big bowlthat contains a mixture of water and ice in thermal equilibrium. How much additional ice will be formed
A car goes around a curve on a road that is banked at an angle of 35.0^\circ. What is radius of curve
Let's say your can has covers a distance of 3 m in 5 seconds under constant acceleration. Use kinematics equations and Newton's second law to calculate the acceleration of the can
A 5.0×10?2 kg arrow hits the target at 25 m/s and penetrates 3.8cm before stopping. What average force did the target exert on the arrow
q1. a football spends a total of 5 seconds in the air. it reaches a peak height of 30 meters. how long does it take to
a dart is thrown horizontally at a dartboard and strikes the dart board 0.08 meters below the bulls eye. the dart board
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