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A train travels due south at 60 m/s. It reverses its direction and travels due north at 60 m/s. What is the change in velocity of the train?
What is the optimal speed of the ferry, relative to the shore, if it moves perpendicular to a 6 km/h current?
The liquid is inviscid; that is, it has no viscosity, and offers no frictional resistance to movement through it.
What is the magnitude of the gravitational force acting on a 79.5-kg student due to a 60.0-kg student sitting 2.25 m away in the lecture hall?
Some common problems that all homeowners face at one time or another include buckling sidewalks due to changes in temperature.
Bimetallic strips used as adjustable switches in electric appliances consist of metallic strips that must have different.
The filament of a light bulb has a resistance of 580 ?. A voltage of 120 V is connected across the filament. How much current is in the filament?
Consider two Carnot heat engines operating in series. The first engine receives heat from the reservoir at 1800 K, and rejects the waste heat
A Carnot engine operating at 30% efficiency exhausts heat into a heat sink at 283 K. By how much would the temperature of the heat reservoir
Two equipotential surfaces surround a +1.20 10-8 C point charge. How far is the 150 V surface from the 75.0 V surface?
A 200 lb metal object is suspended in a liquid with a specific gravity of 1.6. The metal object has a weight density of 150 lb/ft^3.
A woman runs up a flight of stairs. The gain in her gravitational potential energy is U. If she runs up the same stairs with twice the speed.
A 100 kg object is pulled upwards 5.0 meters by a rope with an acceleration of 1.0 m/s^2. Find the work done by the tension force in the rope.
In an atwoods machine experiment, the larger mass is 1.8kg and the smaller mass is 1.2kg. Ignoring friction what is the acceleration of the masses.
(a) What is the momentum of a 1.20 x 10^4 kg garbage truck moving at 30.0 m/s? (b) At what speed would an 8.00 kg trash can have the same momentum?
How many revolutions do the tires make, neglecting any backing up and any change in the radius due to wear?
A water well has an 8-inch diameter and is 175 feet deep. Assume that water enters the well at a rate of 4 gallons per minute.
Energy is conventionally measured in Calories as well as in joules. One Calorie in nutrition is one kilocalorie, defined as 1 kcal = 4186 J.
The work done by a conservative force on a particle is equal to the increase of the corresponding potential energy of the particle.
If the speed of the cycle at the bottom of the hill is 10ms(-1) what is the kinetic energy of the cycle+rider?
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s/s. Through what angle has the wheel turned when its angular speed.
What will be the maximum kinetic energy (in eV) with which this same radiation ejects electrons from another metal whose work function is 2.01 eV?
Under what conditions would kinetic energy not be conserved? Explain each response and back up your response using principles of physics.
If Ms. takes a running start so that she is moving at 2.40 m/s at the bottom of the ramp, what is her speed when she reaches the top of the incline?
Process 1 requires 600 joules added, process 2 requires 200 J added. What is the change in internal energy as a result of the first two processes?