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Robin pushes a wheelbarrow with exerting a 145-N force horizontally. Robin moves it 60.0 m at a constant speed for 25.0 s.
1. What power does Robin develop?
2. If Robin moves the wheelbarrow twice as fast, how much power is developed?
A baton twirler throws a spinning baton directly upward. determine the height to which the center of the baton travels above the point of release
A toy of mass 0.155 is undergoing simple harmonic motion (SHM) on the end of a horizontal spring with force constant 295 . When the object is a distance 1.15×10?2 from its equilibrium position, it is observed to have a speed of 0.305.
question a golf ball is hit and leaves the ground at 35 ms. if its speed is 23 ms at the peak of its path what is the
The magnitude of magnetic dipole moment of Earth is 8 multiplied by 1022 J/T. Assume that this is produced by charges flowing in Earth's molten outer core. If theradius of their circular path is 3500 km, calculate the amount ofcurrent associated wi..
A horizontal beam of electrons initially moving at 3.9 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates as shown in the diagram. The magnitude of the field is 1.70 104 N/C.
A circular coil with an area A=.4400m^2 is rotating in a magnetic field B=2.70T at a frequency f=60Hz. what is the peak Emf induced in the coil
A circuit consists of a 12.0- battery connected to three resistors (40 , 16 and 120 ) in series. Find the current that flows through the battery
Electromagnetic waves propagate through what? What is oscillating? What determines the velocity c in free space
a solid disk is released from rest and rolls without slipping down an incline plane that makes an angle of 25degrees
A fugitive tries to hop on a freight train traveling at a constant speed of 5.4m/s . Just as an empty box car passes him, What is the distance traveled to reach the box car
Two plane mirrors stand facing each other, 2.79 m apart, and a woman stands between them. What is the position of the third closest image
A 76 kg window cleaner uses a 12 kg ladder that is 5.1 m long. He places one end on the ground 2.0 m from a wall, What is the angle of this force on the ladder
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