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Q. Karol told his brother Charles, I just couldnt lift that 30 kg bag of cement into Dad's wheelbarrow unitl I got a pulley and rope. Explain how Karl lifed th cement and how much effort h had to apply.

Q. A speeding motorist traveling 120 km/h passes a stationary polive officer. the officer chases the motorist three seconds later at a constant acceleration of 6.0 m/s². How much time will it take for the police officer to catch the speeder, assuming that the speeder maintains a sonstant speed? How fast will the police officer be traveling at this time?

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