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A car m = 2500 kg is traveling at a constant speed of v = 33 m/s. The car experiences a drag force (air resistance) of Fd = 250 N.
a) Write an expression for the power the car must produce Pi to maintain its speed.
b) What is the power in horsepower (hp)?
c)The car encounters an incline which makes an angle of ? = 7 degrees with respect to the horizontal. The cruise control kicks in and increases the power to maintain the speed of the car. What is the new power (in hp) required to maintain a constant speed?
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.50 °C. What must be the minimum temperature of the hot heat reservoir in order to reach at least 46.40 percent efficiency with heat-engine? (Give the answer i..
When the water turns to ice during the night, heat is free into the plants, thereby giving them a measure of protection against the falling temperature. Assume a grower sprays 7.64 kg of water at 0°C onto a fruit tree.
An ideal monatomic gas at first has a temperature of 311K and a pressure of 7.57atm. It is to expand from volume 571 cm3 to volume 1390 cm3.
A platform is rotating with an angular speed of 3.00 rad/s and an angular acceleration of 11.0 rad/s2. what is the magnitude of the total acceleration a
A torsion pendulum is made from a disk of mass m = 5.7 kg and radius R = 0.67 m, What is the torsion constant of this pendulum
A juggling bag is thrown straight up into the air and is caught 3 s later, What is the initial velocity of the bag
Two liquids, A and B, are mixed together, and the resulting temp is 22C. If liquid A has mass m and was initially at temp 35C, and liquid B has mass 3m and was initially at temp 11C, cacluatle the ratio of the specific heats of..
Observer S detects two flashes of light. A big flash occurs at x1 = 1242 m and, 6.06 ?s later, a small flash occurs at x2 = 802 m. what is the time interval between the flashes
A 13g bullet traveling 221 m/s penetrates a 2 kg block of wood and emerges cleanly at 160 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
Plot the position, velocity, and acceleration of the plane throughout this time interval as a function of time, using initial position of the plane as the origin.
A uniform door weighs 46-N and is 0.9 m wide and 2.5 m high. What is the magnitude of the torque because of the door's own weight about a horizontal axis perpendicular to the door and passing through a corner.
A diver of weight 780 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m
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