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Determine the parachutist's acceleration when the chute is just opened, assuming his mass is 60 kg.
If the net force acting on the particle is 6.22×10-3 in the positive direction, find the components of the particle's velocity. Assume the particle's velocity is in the x-y plane.
Find the magnitude, Fn of the force rquired to slide the lawnmover over the ground at constant speed by pushing the handle.
Calculate the speed of (a) a proton and (b) an electron after each particle accelerates from rest through a potential difference of 250V.
They are then released from rest simultaneously and allowed to interact via the electric force. Which particle reaches the origin first?
Calculate the tension in the string when the angular velocity of the turntable is 60 rpm (rotations per minute).
A mass of 360g stretches a spring 2cm. If the spring-mass system is placed in a medium that imparts a viscous force of 1N when the speed of the mass is 1cm/sec, find the damping coefficient for this
A straight 1.71mm diameter copper wire can just "float" horizonally in air because of the force of the Earth's magnetic field B which has a component that is horizontal, perpendicular to the wire, a
A charge q1 is inside a spherical surface (although not necessarily at the exact center of the sphere). A second charge q2 sits just outside the surface. Choose whether the following statements are
Approximately what is the magnitude of the magnetic field of magnet A a distance of 0.36 m from the center of the magnet, along the same axis?
A very long wire carrying a conventional current of 3.9 amperes is straight except for a circular loop of radius 5.8 cm. Calculate the approximate magnitude and the direction of the magnetic field a
(a) A loop of wire carries a conventional current of 0.6 amperes. The radius of the loop is 0.06 m. Calculate the magnitude of the magnetic field at a distance of 0.37 m along the axis of the loop,
A 5.5-kg block slides down a frictionless incline making an angle of 50.0° with the horizontal. (a) What is the total work done on the block when the block slides 1.6 m (measured along the incline
A tuning fork is sounded above a resonating tube(one end closed) which resonates at a length of 0.2m and again at 0.6m. What is the frequency of the fork when the speed of sound is taken to be 340m/
Two identical batteries, each with an emf of 18V, and an internal resistance of 1 Ohm, are wired in parallel by connecting their positive terminals together and connecting their negative terminals t
A) Copper contains 8.4 x 10^28 free electrons/m^3. A copper wire of cross-sectional area 7.4 x 10^-7 m^2 carries a current of 1 A. Find the electron drift speed.
If the mass of the block is 0.167 kg and has an original speed of 0.70 m/s at a radius of 0.4 meters, what is the tension in the cord in the final situation at a radius of 0.2 meters when the block
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can when it reaches the bottom?
Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33 x 10^9 J.
The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final angular velocity in 7.4 s. How long does it take for the second sheet, starting from rest, to reach t
When a 35-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 120 rad/s2. What is the mass of the disk?
A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 25 rad/s in 0.67 s. Assuming the CD is a uniform solid
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 9.1 rad/s. The wheel has a radius of 0.35 m. If you ride the bike for 2060 s, h
Dana has a sports medal suspended by a long ribbon from her rearview mirror. As she accelerates onto the highway, she notices that the medal is hanging at an angle of 12^\circ from the vertical.
A physics instructor in an anteroom charges an electrostatic generator to 25uC, then carries it into the lecture hall. Find the net electric flux, in Nm^2/C, through the lecture hall walls.