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Q. A person pushes horizontally with a force of 230N on a 60kg crate to move it across a level floor. The coefficient of kinetic friction is 0.35. (1) What is the magnitude of the frictional force? (2) What is the magnitude of the crate's acceleration?

Q. A race car is one lap behind the lead car when the lead car has 43 laps to go in a race. If the speed of the lead car is 54.2 m/s, what should be the average speed of the second car to catch the lead car just before the end of the race (i.e. right at the finish line)? Suppose i lap is 1.34 km.

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