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A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.7 m/s2.The driver then applies the brakes, causing a uniform acceleration of -3.0m/s2. If the brakes are applied for 1.0 s, decide each of the following.
a) How fast is the car going at the end of the braking period?
b) How far has the car gone?
A guitar string is 90.0 cm long and has a mass of 3.27g . From the bridge to the support post (=?) is 60.0 cm and the string is under a tension of 514 N
A model airplane with a mass of 0.757 kg is tethered by a wire so that it flies in a circle 30.9 m in radius, Find the angular acceleration of the airplane when it is in level flight
Figure 13-46 shows four particles, each of mass 30.0 g, that form asquare with an edge length of d = 0.700 m.If d is reduced to 0.400 m, what is the change in the gravitational potential energy of the four-particle system?
Calculate the self inductance of a solenoid that has N turns, a length L, a radius R, and is carrying a time varying current I(t)
when a 0.20-kg block is suspended from a vertically hanging spring it stretches the spring from its original length of
an open tube of length l 2.07 m and cross-sectional area a 4.60 cm2 is fixed to the top of a cylindrical barrel of
A proton accelerates from rest in a uniform electric field of 524 N/C. What is the magnitude of the acceleration of the proton
A long thin steel rod is 500.00 centimeter long at 0oC. Find the length of the rod at the higher temperature
A batter hits a pitched ball when the center of the ball is 1.09 m above the ground. The ball leaves the bat at an angle of 45° with the ground. With that launch, the ball should have a horizontal range (returning to the launch level) of 107 m.
A satellite has a mass of 6358 kg and is in a circular orbit 4.89× 105 m above the surface of a planet. Evaluate the true weight of the satellite
Amtrack's high speed train, the acela, utilizes tilt of thecars to negotiate curves. calculate the friction force needed on a train passenger ofmass 75kg if the track is not banked and the train does not tilt
A certain transformer has 500 turns on the primary. If 10 volts are applied to the primary, what was the current in the primary
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