4 Simple multiple choice Physics 101 questions

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Science

Ontario Tech University

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I’m trying to study for my Physics course and I need some help to understand this question.

 

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Question 1 A child of mass 23.0 kg and a man of mass 82.0 kg are sliding across a horizontal icy surface. Starting from rest, yhey are both pushed with the same force for a time of 1.10 s with no friction. Once the pushing force has been removed from both the child and the man, the momentum of the child is Less than the momentum of the man Greater than the momentum of the man. Zero Equal to the momentum of the man. Question 2 A 2.00 kg toy car is moving to the right with a speed of 1.20 m/s without friction. If it experiences an impulse of -4.00 Ns, what is the object's speed and direction after the impulse occurs? 1.60 m/s to the right 6.40 m/s to the left O 3.20 m/s to the right O 0.800 m/s to the left Question 3 Two people, Charlotte and James, are sitting on a frozen lake and push off of each other. If James weighs more than Charlotte, which will have the greater momentum? Their momentum will be equal James Charlotte Question 4 Ру P2 P1 Px An object at rest explodes into three fragments. The figure shows the momentum vectors of two of the fragments: • vector P1 is directed along the Praxis and has a magnitude of 66.0 kgm/s. • vector P2 is at an angle of 90.0° measured counterclockwise from the positive p, axis and has a magnitude of 66.0 kg m/s. What are the P and components of the momentum of the third fragment? px - 150. kg m/s, Py = 84.0 kg m/s 2x = -66.0 kgm/s, py=-4.04x10-15 kg m/s Px = -66.0 kg m/s, Py = -66.0 kg m/s px=-132 kg m/s, P, = -4.04x10-15 kg m/s
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New York University

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