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A toy train is pushed forward and released at 2.0m with a speed of 0.5 m/s. It rolls at a steady speed for 2.0s, then one wheel begins to stick. The train comes to a stop at 5.0m from the point at...

A speed skater moving across frictionless ice at 5.0m/s hits a 3.0-m-wide patch of rough ice, she slows steadily, then continues on at 3.7m/s. What is her acceleration on the rough ice? Use 2 significant...

A rock is thrown (not dropped) straight down from a bridge into the river below. What is the magnitude of rock's acceleration immediately after being released? Disregard air resistance. a)...

Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 34.0 mph and half the distance at 66.0 mph . On her return trip, she drives half the time...

1. Find the resistance of a 30 meter length of copper wire of 0.8 mm diameter. 2. How hot would a copper wire need to be for its resistance to be 3% larger than its value at room temperature (20ºC)...

Two point charges, Q1 = 3.7 μC and Q2 = -1.3 μC, are placed on the x axis. Suppose that Q2 is placed at the origin, and Q1 is placed at the coordinate x1 = -5.0 cm. (a) At what point(s) along...

The electric field between the plates of a paper-separated (K=3.75) capacitor is 8.25×104 V/m. The plates are 2.15 mm apart, and the charge on each plate is 0.670 μC.   (a) Determine...

The charge on a capacitor increases by 18 μC when the voltage across it increases from 93 V to 118 V. What is the capacitance of the capacitor?

A large electroscope is made with "leaves" that are 78-cm-long wires with tiny 47 g spheres at the ends. When charged, nearly all the charge resides on the spheres. If the wires...

A city has streets laid out in a square grid, with each block 135 m long.  If you drive north for three blocks, then west for two blocks, how far are you from your starting point?