If the football has the mass of .420 kg and the time of, Ask an Expert

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Q1. If the football has the mass of .420 kg and the time of contact with the ball is .014 s, what is the force exerted by the ball on a kicker's foot?

Q2. At high noon, the sun delivers 1 300 W to each square meter of a blacktop road. What is the equilibrium temperature of the hot asphalt, assume its emissivity e = 1? (Sigma = 5.67 times 10^ {-8} W/m^2.K^4).

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Category:- Physics
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