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A car starts from rest and travels for 7.0 s by 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?
The magnitude of the vectors F is 30 N, the force on the right is applied at an angle 64 degrees and the the mass of the block is 53 kg. If the surface is frictionless, what is the magnitude of the resulting acceleration?
A block of mass .250 kg traveling at (1.0 m/s)y hits a second block with a .375 kg mass travelling at (1.2m/s)x, What is the velocity of the 1st blcok after they hit each other
The coefficient of friction between a certain brass block and a large revolving turntable is μ = 0.24. What is the period of rotation of the turntable
A 1320-kg car is moving due east with an initial speed of 25.3m/s. After 11.5 s the car has slowed down to 15.2 m/s. Find the magnitude of the net force that produces the deceleration.
A geodesic dome constructed with an aluminum framework is a nearlyperfect hemisphere; its diameter measures 56.0 {\rm m} on a winter day at a temperature of -10{\rm ^\circ C}. How much more interior space does the dome have
A wind turbine is initially spinning at a constant angular speed. Determine the initial angular velocity of the turbine
a magnetic field increases from 0 to 0.30t in 1.5 seconds. how many turns of wire are needed in a circular coil 15cm in
The A string of aviolin is a little too tightly stretched. What is the period of the violin string oscillation
A spaceship of rest length 192 m races past a timing station at a speed of 0.780c. What is the length of the spaceship as measured by the timing station
On her way to visit Grandmother, Red Riding Hood sat down to rest and placed her 1.7-kg basket of goodies beside her. A wolf came along, at what angle was Red Riding Hood pulling
A spring (k=100N/m) is squished x=.40 m with a mass m=1 kg held against it. With what speed v does the mass exit the rough region
The electrical power output of a large nuclear reactor facility is 890 MW. It has a 34.0% efficiency in converting nuclear power to electrical. What is the nuclear power output in megawatts
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