Download Practice Test 2 for Newtonian Mechanics | PHYS 114 and more Exams Physics in PDF only on Docsity!
PYYS- 114 Practice Test #2 Page 1 of 6 [1] A 1.0-kg physics book is given an initial velocity of 3.0 m/s up a ramp. The ramp makes an angle of 20° above the horizontal. If the coefficient of kinetic friction between the book and the surface is 0.2, how far up the ramp does the book slide? MODEL:( what assumptions are you going to make ?) VISUALIZE: Pictorial ( sketch – with coordinate axis, and all symbols, list of knowns and unknowns ) Physical ( motion diagram ) Physical ( Free Body Diagram )
Page 2 of 6 Practice Test #2 PHYS- 114 SOLVE: ( use Newton’s 2nd^ Law for x and y and equations of motion to find the answer ) ASSESS: ( compare your acceleration to g and justify your distance is reasonable. 1.0 m/s = 2.24 mph )
Page 4 of 6 Practice Test #2 PHYS- 114 SOLVE: ( use the equations of motion for x and y to find the answer ) ASSESS: ( compare your distance to the known initial position and the size of a TV screen )
PYYS- 114 Practice Test #2 Page 5 of 6 [4] Dr. Russell places his 20-kg daughter on a 5-kg cart to which a 2.0-m long rope is attached. He then holds the end of the rope and spins the cart and child around in a circle, keeping the rope parallel to the ground. It takes 4.44 seconds for the cart to make one complete trip around the circle. Rolling friction between the cart’s wheels and the ground is negligible. The rope can support a maximum tension of 120N. Does the rope break? MODEL: ( what assumptions are you going to make ?) VISUALIZE: Pictorial Physical ( Free Body Diagram ) ( sketch with coordinate axis, symbols, list of knowns ) SOLVE: ( Use Newton’s 2nd^ Law to find the answers ) ASSESS: ( What is the answer to the question? Are the speeds and forces reasonable? )
