Physics Waves And Oscillations Level: High School
Simple Harmonic Motion
While visiting friends at Cal State Chico ,you pay a visit to the Crazy Horse Saloon . This fine establishment features a 200-kg mechanical bucking bull , that has a mechanism that makes it moves vertically in simple harmonic motion . Whether the “bull” has a rider or not , it moves with the same amplitude 25 cm. You watch and notice that in a 10-s interval . It makes 15 oscillations . After watching other saloon patrons hold on the “bull” while riding , you decide to ride it the macho way by not holding on . No one is terribly surprised when you come out of the saddle Later , while waiting for your bruises and pride to heat, you pass the time by calculating at what point in the bull’s cycle you lose contact .
Physics Kinematics Level: High School
Relative Velocity
A motorist with an expired lag is traveling at 10.0 m/s down a street and a policemen on a motorcycle takes 5.00 s to give chase , at an acceleration of 2.00 m/s . Finda) The time it takes to catch the car
b) The distance the trooper travels while overtaking the motorist
Physics Kinematics Level: High School
One dimensional Motion
Suppose a driver going 17.5 m/s slams on he brakes , stopping the car in 4.00 s . Find ,a) The acceleration
b) The distance the car travels assuming the acceleration is constant .
Physics Kinematics Level: High School
Free fall
A small mailbag is released from a helicopter that is descending steadily at 1.50 m/s .After 2.00 s ,a) What is the speed of the mailbag
b) How far is it below the helicopter ?
c) What are the answers to parts a and b if the helicopter is rising steadily at 1.50 m/s ?
Physics Kinematics Level: High School
One Dimensional Motion
In 1865 Jules Verne proposed sending men to the moon by firing a space capsule from a 220 m long cannon with final speed of 10.97 km/s . What would have been the unrealistically large acceleration experienced by the space travelers during their launch ?
Physics Kinematics Level: High School
Relative Velocity
Two cars travels in the same direction along a straight highway , one at a constant speed of 55 mi/h and the other at 70 mi/h .a) Assuming that they start at the same point , how much sooner does the faster car arrive at a destination 10 mi away ?
b) How far must the faster car travel before it has a 15-min lead on the slower car ?
Physics Heat & Thermodynamics Level: High School
Entropy
An aluminum rod conducts 7.79 cal/s from a heat source maintained at 252 degree C to a large body of water at 28.8 degree C . Calculate the rate entropy increases per unit time in this process .
Physics Heat & Thermodynamics Level: High School
Refrigerator
A restaurant refrigerator has a coefficient of performance of 5.12 . If the temperature in the kitchen outside the refrigerator is 30.1 degree C , what is the lowest temperature (in Celsius ) that could be obtained inside the refrigerator if it were ideal ?
Physics Heat & Thermodynamics Level: High School
Carnot engine
A Carnot engine performs work at the rate of 426 kW while using 636 kcal of heat per second . If the temperature of the heat source is 525 degree C , at what temperature (in Celsius) is the waste heat exhausted ?
Physics Heat & Thermodynamics Level: High School
Heat Engine
A heat engine does 7280 J of work in each cycle while absorbing 12.5 kcal of heat from a high-temperature reservoir . What is the efficiency (in percent) of this engine ?
Physics Heat & Thermodynamics Level: High School
First Law of Thermodynamics
In the process of taking a gas from state a to state c along the curved path shown in the figure at ‘click here’, 88.0 J of heat leave the system and 57.3 J or work are done on the system .Determine the change in the internal energy , Uc-Ua . Here is a summery of what is given .
Qac = -88.0 J
Wac = -57.3 J
Wcda = 37.6 J
Ua-Ub = 11.9 J
Pa = 2.35 Pd
a) When the gas is taken along the path cda , the work done by the gas is W = 37.6 J . How much heat Q is added to the gas in the process cda ?
b) If Pa = 2.35 Pd, how much work is done by the gas in the process abc ?
c) What is Q for path abc ?
d) If Ua-Ub = 11.9 J , what is Q for the process bc ?
Physics Heat & Thermodynamics Level: High School
W.D in Isothermal process
An ideal gas expands isothermally, performing 5.26 x 10^3 J of work in the process . Calculate the change in internal energy of the gas .a) Calculate the heat absorbed during this expansion .
Physics Work,Power & Energy Level: High School
Power
A 10.0 kg object accelerates from rest at 0.50 m/s^2 across a horizontal surface for a distance of 4.25 m . If uk is 0.25 .a) Find the final kinetic energy of the object .
b) find the power required .
Physics Work,Power & Energy Level: High School
Conservation of Energy
A 52 kg crate , initially at rest, loses 15% of its potential energy through friction as it slides down a 2.00 m high ramp .a) Find the velocity of the crate
b) Find the time to slide down the ramp .
Physics Work,Power & Energy Level: High School
Conservation of Energy
A 3.25 kg mass falls from a height of 1.70 m onto a spring . for this spring, a force of 720 N will stretch it by 0.150 m .b) The spring will be compressed a maximum distance of ------- by the mass .
