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Q. A 1500 -kg automobile travels at a speed of 75 -km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop.
(1) What would be the car's stopping distance for dry pavement (µ = 0.85)?
(2) What would be the car's stopping distance for wet pavement (µ = 0.60)?
A sanding disk with rotational inertia 8.1 x 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of magnitude 20N·m about central axis of the disk. About that axis and with torque applied for 29 ms, what is the magnitude of (..
A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handl..
A step-up transformer has 300 turns on its primary coil and 90000 turns on its secondary coil if the current flowing through the secondary is 5 amps what is the current flowing in the primary.
An electric motor rotating a workshop grinding wheel at a rate of 107 rev/min is switched off. Assume the wheel has the constant negative angular acceleration of magnitude 1.70 rad/s2.
A 1050kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes car to bounce on its spring suspension.
A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest.
A 46kg box is being pushed a distance of 7 m across the floor by the force vector P whose magnitude is 144N. The force vector P is parallel to the displacement of the box.
A ranger in a national park is driving at 41km/h when a deer jumps onto the road 66 m ahead of the vehicle. After a reaction time of t s, ranger applies the brakes to produce an acceleration of -3.20m/s2. What is the maximum reaction time allowed ..
What is magnitude of the linear acceleration of the hoop . Elucidate using Newton's Second Law of Motion, why you can throw a golf ball further than a bowling ball, still though you throw both at the similar angle and with the same amount of force.
Four particles are held in place at the corners of a square with sides of length L. Each particle has a charge q and mass m. (a) What is the potential energy of the system of charges.
An infinite non conducting sheet has a surface charge density σ = +5.80 pC/m2. (a) How much work is completed by electric field because of the sheet if a particle of charge q = +1.60 × 10-19 C is moved from the sheet to a point P at distance d = 3.56..
A bartender slides a beer mug at 1.30 m/s towards a customer at the end of a frictionless bar that is 2.0m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar.
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