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A 1100 kg car traveling at 27 m/s starts to decelerate and comes to a complete stop in 432 m. What is the average braking force acting on the car?
A person carries a long pole of mass 18 kg and length 5.0 m. Find the magnitude of the torque on the pole due to gravity.
A 30.0 mu F capacitor initially charged to 20.0 mu C is discharged through a 2.40 kOmega resistor. How long does it take to reduce the capacitor's charge to 9.00 mu C?
A singly charged positive ion has a mass of 2.27 10-26 kg. After being accelerated through a potential difference of 246 V, the ion enters a magnetic field of 0.440 T, in a direction perpendicular
A 40.0 kg person, standing 1.0 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.40 m/s relative to the ground. Find the resulting angular speed of the di
A car battery with a 12 V emf and an internal resistance of 0.040 is being charged with a current of 50 A. What is the rate Pr of energy dissipation inside the battery?
A capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has radius 12.0 cm, and the outer sphere has radius 16.5 cm. A potential difference of 110
Andrea and Chuck are riding on a merry-go-round. Andrea rides on a horse at the outer rim of the circular platform, twice as far from the center of the circular platform as Chuck, who rides on an in
Two strings have different lengths and linear densities. They are joined together and stretched so that the tension in each string is 205 N. The free ends of the joined string are fixed in place. Fi
At a distance of 3.7 m from a siren, the sound intensity is 2.80 10-2 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.
A sled weighs 10 kg. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. Find the tension in the rope?
To keep a room at a comfortable 21.0°C a Carnot heat pump does 345 J of work and supplies it with 3240 J of heat.
If the electron follows a circular path with a radius of 16 cm, what is the magnitude of the magnetic field?
Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped
A 5.00uF capacitor is initially charged to a potential of 16.0V. It is then connected in series with a 3.75 mH inductor. What is the total energy stored in this circuit?
An airplane needs to reach a velocity of 203 km/h to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight?
A car of mass M = 1200 kg traveling at 45.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires.
A pitcher throws a curveball that reaches the catcher in 0.63 s. The ball curves because it is spinning at an average angular velocity of 270 rev/min (assumed constant) on its way to the catcher's
A bullet is fired straight up from a gun with a muzzle velocity of 133 m/s. Neglecting air resistance, what will be itsdisplacement after 3.8 s? The acceleration of gravity is 9.8 m/s2.
Describe thinking, intelligence, and creativity in your own words. How are thinking, intelligence, and creativity related?
A ball rolls horizontally off the edge of a tabletop that is 1.05 m high. It strikes the floor 2.80 m away from the edge of the table. What is the initial (horizontal) velocity of the ball? Ignore a
What resistive force (assumed to be constant) does the wood exert on the bullet? How long does it take the bullet to come to rest?
The Sun is a low mass star and so will never have the core fusion reactions of massive stars. Yet, the Sun has iron in its atmosphere, as well as gold, silver and other elements much heavier than i
The balances read 385 and 115 as shown. Both are 20 cm from each end of the meterstick. Assume the meterstick has zweo mass and use torques to calculate the position of the 500g weight on the stick
A 10.80 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.680 T pointing up. During the course of 0.160 s, the field is changed to one of 0.250