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Q. A 4.5 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=13.50 N at an angle theta=30.0 degrees above the horizontal. What is the speed of the block 5.50 seconds after it starts moving?

Q. The atmospheric pressure at sea level is about 1.0 multiplied by 105 Pa. What is the force at sea level that air exerts on the top of a typical office desk, 159 cm long and 86 cm wide?

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