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A car starts from rest and travels for 8.0 s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s2. If the brakes are applied for 3.0 s, determine each of the following.
(a) How fast is the car going at the end of the braking period?
(b) How far has it gone?
A highway curve of radius 500 m is designed for traffic moving at a speed of 73 km/hr. What is the correct banking angle of the road.
The security alarm on a parked car goes off and produces a frequency of 1200 Hz. The speed of sound is 343 m/s. At what speed are you driving
Three 45 ohm lightbulbs and three 75 ohm lightbulbs are connected in series. what is the total resistance of the circuit
The rope makes an angle of 70° with respect to the vertical. What is the tangential speed of the ball.
For no apparent reason, a poodle is running at a constant speed of 6.00 m/s in a circle with radius 2.9 m. Let v1 be the velocity vector at time t1 , and let V2 be the velocity vector at time t2 . Consider (change in v)=v2-v1 and (change in t)=t2-..
A charge of -4 nC is at the origin and a second charge of 14 nC is at x = 3.00 m. Find out the magnitude and direction of the electric field halfway in between two charges.
Two 0.70g spheres are charged equally and placed 2.4 cm apart. what is the charge on each sphere
A 965-kg satellite orbits the Earth at a constant altitude of 94-km. What is the change in the system's potential energy
What is its initial velocity as it leaves the ground. Two particles are fixed on an x axis.
A lump of putty with a mass of 0.550 kg and a speed of 0.750c collides head-on and sticks to an identical lump of putty moving with the same speed
Calculate the acceptance cone angle for a fiber optic cable that has an index of 1.70 for the fiber core and a 1.47 index for the cladding. What is the acceptance cone angle
Two mirrors meet at a 127° angle. If light rays strike one mirror at 40° as shown, at what angle ? do they leave the second mirror.
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