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Assume that the positively charged particle starts at point A with an initial velocity in the positive x-direction. write down the expression for the position of the particle as a function of the particle as a function of time, x(t), in terms of the initial position x0, and the initial speed v0, charge q, mass m, and the electric field component Ex.
A woman on a bridge 86.8 m above a stream sees a bottle floating along at a constant speed. Calculate the speed of the bottle
A 55.1-kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. Determine the force exerted by the horizontal rope on her arms
The force required to stretch a Hooke's-law spring varies from 0 N to 76.4 N as we stretch the spring by moving one end 14.6 cm from its unstressed position. Find the work done in stretching the spring
A marine biologist powers the 800 W, 24 V electric outboard motor on her boart from a 75 A*hr battery. How long can she run the motor before the battery is drained?
A daredevil on a motorcycle leaves the end of a ramp with a speed of 33.0 m/s, what is the maximum height that he reaches
An electron on the axis of an electric dipole is 23 nm from the center of the dipole. What is the magnitude of the electrostatic force on the electron if the dipole moment is 4.0 10-29 C·m? Assume that 23 nm is much larger than the dipole charge sepa..
A skater holds her arms outstretched as she spins at 150 rpm. What is the speed of her hands if they are 145 cm apart
In the Bohr model of the hydrogen atom, an electron (mass m=9.1×10^?31kg) orbits a proton at a distance of 5.3×10^?11m. How many revolutions per second does the electron make
A mass (M=2kg) is placed in front of a spring with k=900N/m, compressed d=50cm. The spring is released, shooting the mass forward from A to the spring's equilibrium position at B, What is the velocity of the mass at point C
A proton travelling along the axis of a 2cm ring with a charge density of 5nC/cm is 5 cm from the center of of the ring and travelling toward it. What speed must it have to cross the ring's plane
How far must it now sail to reach its original destination. find the potential energy of the system.
A speeder is pulling directly away and increasing his distance from a police car that is moving at 23 m/s with respect to the ground. Find the speeder's speed with respect to the ground
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