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A car zooms around a curve (radius = 20 m) at a speed of 20 m/s.
a. What is the centripetal acceleration of the car?
b. How many g's does this car experience?
c. If the car has a mass of 1200 kg, what centripetal force is the ground exerting on the car's tires to make it turn?
A 48 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.0 m/s. determine her altitude as she crosses the bar
A common flashlight bulb is rated at 0.30 A and 2.8 V (the values of the current and voltage under operating conditions). what is the temperature of the filament when the bulb is on? The filament is made of tungsten
Through what maximum angle θmax will the reference line turn in the positive direction? What are (b) first and (c) second times the reference line will be at θ = θmax/3? At what (d) negative time and (e) positive time will the reference line be at..
Use the table shown below to determine the energy in eV of the photon emitted when an electron jumps down
Typically, a tennis ball hit during a serve travels away at about 47 m/s. what is the magnitude of the change in its momentum
A baseball pitcher pivots his extended arm about his shoulder joint, applying a constant torque of 197 N · m for 0.24 s to his arm, Find his arm's angular acceleration and final angular velocity
Two runners approaching each other on a straight track haveconstant speeds of 4.50m/s and 3.50m/s, respectively, whenthey are 100m apart. How long will it take for the runners tomeet, and at what position will they meet if they maintain these speeds?
a ball moving at 5m/s collides head on elastically with a ball at rest. what are the velocities or the two balls after the collision
WThe vertical displacement of particles in a string (when a wave is propagating through it) is given by y = (0.02) sin[(10?)t %u2013 (8?)x]
In the meantime, this means the refrigerator produces 1.2177E+4 J of thermal energy that it expels into the kitchen as a result. What is the total work done by the compressor motor in the refrigerator
An airplane with a speed of 93.3 m/s is climbing upward at an angle of 58.5 ° with respect to the horizontal. Relative to the ground, determine the angle of the velocity vector of the package just before impact
A 0.700-kg ball is on the end of a rope that is 2.50 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, What is the tangential speed of the ball
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