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The 40 kg man in the roller coaster car is sitting on a bathroom scale. If he is traveling at 35.3 m/s at the point shown and the radius of the vertical coaster track is 53 meters, to the nearest n
A baseball outfielder throws a 0.150 kg baseball at a speed of 41.0 m/s and an initial angle of 33.0°. What is the kinetic energy of the baseball at the highest point of its trajectory?
a weight lifer llifts a set of weighjts a vertical distance of 2.00 m . if a coinstant net force of 350 N is exerted on the weights , what is the net workdone on the weights.
an object weighs 315 N in air. when tied to a string connected to a balance, and immersed in water, it weighs 265 N. When it is immersed in oil, it weighs 269 N. Find the following:
Three equal point charges, each with charge 1.15 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.600 m. What is the electric potential energy U of the system?
A driver in a car traveling at a speed of 73 km/h sees a cat 115 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 112 m?
A 13 kg child on a playground swing moves with a speed of 3.6 m/s when the 6.0 m long swing is at its lowest point. What is the angle that the swing makes with the vertical when the child is at the
At an initial temperature of (20 degrees C), a specific heat of (910 j/g degrees C), and a melting point of 660 degrees C. Find the time it takes for the laser to melt the aluminum.
A centrifuge rotor rotating at 14,000 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.60 m·N. If the mass of the rotor is 4.80 kg and it can be approx
If you use the lightbulb in the United States at 120 V (assume its resistance does not change), how bright will it be relative to 45 W 120 V bulbs?
A solid brass sphere of 5.00-mm radius on which there is a positive charge of 800 statC is put in contact with a hollow brass sphere of the same radius on which is a negative charge of 500 statC. T
The other has a magnitude of F2 = 42 N. What is the torque about the axle of the merry-go-round due to the 78 N force?
A rifle is aimed horizontally at a target 51.0 m away. The bullet hits the target 2.30 cm below the aim point. What was the bullet's flight time?
Suppose you have a parallel plate capacitor connected to a 1.5 -V battary. How far apart must the parallel plates be to have an electric field of 1 uV/m between plates?
What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at 4.95 ? Assume that the ship is at rest in the water
The transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? Assume the transducer has been properly zeroed so that V = 0 when F3=0.
A small grinding wheel has a moment of inertia of 4.0×10-5 kg*2. What net torque must be applied to the wheel for its angular acceleration to be 150 rad/s^2?
A golfer imparts a speed of 34.6 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation.
John pushes horizontally with an 80.0 N force against a heavy desk, but the desk doesn't move. How much friction force acts horizontally between the desk and the floor?
How close does the alpha particle get to the gold nucleus before turning around? Assume gold nucleus is static and energy is conserved.
Will the ball arrive in time for your team's catcher to make the tag and win the game?
A ball is thrown with a speed of 16 m/s and at an angle of 35 degrees. How high does it go above the cliff to the nearest tenth of a meter?
The second mass is located 40 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure?
The bubble rises to the surface, where the temperature is 25 degress C. What is the volume of the air bubble right before it breaks?
A 54.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3.00 m . What speed does he need at the bottom?