What constant acceleration, in m/s^2, must a car have to go from 0 to 60mph in 10s?
What constant acceleration, in m/s^2, must a car have to go from 0 to 60mph in 10s?
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...
Excellent human jumpers can leap straight up to a height of 1.1 m off the ground. To reach this height, with what speed would a person need to leave the ground? Assume no air resistance (free-fall...
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...
A particle is projected upwards from the top of a tower. Treat point of projection as origin & upwards as positive. Consider three point on its path such that at (s represents displacement...
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)...
the initial velocity of a particle is u and the acceleration is given by a=kt, where k is a positive constant. the distance travelled in time t is
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?
Is sound energy renewable or non-renewable?
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...
John walks 1.00 km north, then turns right and walks 1.00 km east. His speed is 1.50 m/s during the entire stroll. a) What is the magnitude of his displacement, from beginning to end? b)...
A large passenger aircraft accelerates down the runway for a distance of 3,000m before leaving the ground. It then climbs at a steady 3.0° angle. After the plane has traveled 3,000m along...
Shannon decides to check the accuracy of her speedometer. She adjusts her speed to read exactly 70 mph on her speedometer and holds this steady, measuring the time between successive mile markers...
The end of Hubbard Glacier in Alaska advances by an average of 105 feet per year. What is the speed of advance of the glacier in m/s?
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?
Estimate the average speed with which the hair on your head grows. Give your answer in both m/s and μm/h. Briefly describe how you arrived at the estimate.