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A car starts from rest and travels for 6.0 s with a uniform acceleration of +2.9 m/s2. The driver then applies the brakes, causing a uniform acceleration of -3.0 m/s2. If the brakes are applied for 1.0 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 529 kg automobile slides across an icy street at a speed of 66.0 km/h and collides with the parked car which has a mass of 856 kg. The two cars lock up and slide together. What is the velocity of the two cars just after they collide.
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable above the worker
Calculate the energy density in the electric field. After the collision, the club head travels (in the same direction) at 46 m/s. Find the speed of the golf ball just after impact.
the maxium compresional stress that a bone can with stand is 1.6 * 10^8 N/m^2 before it breaks.What is the maxium compresional force that can be applied to the femur bone
a 0.25 harmonic oscillator has a total oscillation energy of 9.9 j. if the oscillation amplitude is 20.0 cm what is the
A flat, round iron ring 7.00cm in diameter has a current running through it that produces a magnetic field of 77.2?T at its center. find the maximum torque the external field can exert on the ring
q1. a 0.440-kg blue bead slides on a frictionless curved wire starting from rest at point where h 1.40 m. at point the
A projectile is launched with an initial speed of 40.0 m/s at an angle of 30.0° above the horizontal. What is the straight-line distance from where the projectile was launched to where it hits its target
A cannon is rigidly attached to a carriage, which can move along horizontal rails, but is connected to a post by a large spring, Determine the maximum extension of the spring
A compound lens system consists of two converging lenses, one at x = -20.0 cm with focal length f_1= 10.0 cm, and the other at x= 20.0cm with focal length f_2 = 8.0 cm. What is the focal length of the new lens at the origin
Suppose that earth was formed as molten rock at some very high temperatures. Estimate the time for the earth to cool to 300 K.
Consider a long wire that makes a right angle (90°) bend. If the wire carries a current I, what is the magnetic field at point A
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