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A) A person exerts a force of 40.8 N on the end of a door 78.0cm wide. What is the magnitude of the torque if the foce is exerted perpendicular to the door?
B) If the car continues to decelerate at this rate, how much more time is required for it to stop?
An object whose mass is 4 kg is at a radius of r = [ ( -5 i + 3 k ) m ]. Gravity is in the direction of [- j ]. What is the torque produced by gravity
A 30-06 bullet has a mass of 0.010 kg. If the average force on the bullet is 7200 N, what is the bullet's average acceleration?
A proton (1e) and an alpha particle charge = 2e, mass = 6.64 x10^-27 kg are initially at rest, separated by 4.00 x 10^-15 m. Find the speeds of the proton and alpha particle
A superball of mass 60g is dropped from a height of 2m . Itrebounds to a height of 1.80m. WHat is the change in its linear momentum
A technician wearing a circular metal band on his wrist moves his hand (from a region where the magnetic field is zero) into a uniform magnetic field of magnitude 2.0 T in a time of 0.30 s. find the magnitude of the average emf induced in the band
A charged particle is injected at 153 m/s into a 0.0623-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
q1. a small metal sphere carrying a net charge of -2.70 is held in a stationary position by insulating supports. a
The angular velocity of a flywheel obeys the equation , where is in seconds and and are constants having numerical values 2.45 (for ) and 1.60 (for ). Part D What is the angular acceleration of the wheel at = 2.50 ? Part E Through what angle does ..
Two trains on separate tracks move toward each other. Train 1 has a speed of 127 km/h; train 2 a speed of 80.0 km/h. What is the frequency heard by the engineer on train 1
Some nucleus of 74X189 (atomic mass = 188.96191 u) undergoes - decay to become 75X189 (atomic mass = 188.95922 u). What is the energy (in MeV) released in this process
A car has 53% of its weight on its front wheels and 47% on its rear wheels, How far from the rear axle is the car's center of gravity
Two metal balls A and B of negligible radius, connected by a taut nonconducting thread of length 2.40 m, are floating at rest on Space Station Freedom between two metal bulkheads. Ball A carries charge q, and ball B carries charge 2q.
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