Disregard friction between skates and ice

Reference no: EM138623

Q1. A professor's office door is 0.80 wide, 3.0 high, and 5.0 thick; has the mass of 25; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of door frame. When the door is open and at rest, door closer exerts a torque of 5.0. What is the least force that you require to apply to the door to hold it open?

Q2. A (n) 85.2 kg person throws a (n) 0.075 kg snowball forward with a ground speed of 37.7 m/s. A second person, of mass 57.9 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 1.26 m/s, and the second person is initially at rest. What is the velocity of the first person instantly after the snowball is thrown? Disregard friction between skates and ice.

Reference no: EM138623

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