Energy and Power Test Study Guide – answer key
... 3. A person is using a force of 300N to push a cart. How much power does the person need to push the cart a distance of 5m in 20s? 75 watts (Power = Work ÷ time) 4. In competition, weightlifter 1 lifts 150 kg weight from the floor. Weightlifter 2 also lifts 150kg weight to the same height above the ...
... 3. A person is using a force of 300N to push a cart. How much power does the person need to push the cart a distance of 5m in 20s? 75 watts (Power = Work ÷ time) 4. In competition, weightlifter 1 lifts 150 kg weight from the floor. Weightlifter 2 also lifts 150kg weight to the same height above the ...
HW5
... 2(9.80 m/s 2 ) (e) It is evident that the above results do not depend on mass. Thus, a different mass for the coaster must lead to the same results. 8.31. The reference point for the gravitational potential energy Ug (and height h) is at the block when the spring is maximally compressed. When the bl ...
... 2(9.80 m/s 2 ) (e) It is evident that the above results do not depend on mass. Thus, a different mass for the coaster must lead to the same results. 8.31. The reference point for the gravitational potential energy Ug (and height h) is at the block when the spring is maximally compressed. When the bl ...
Chapter 6 Notes
... The work done by a varying force can be determined graphically. If you plot F vs d, then the work is the area under the curve at the two points. ...
... The work done by a varying force can be determined graphically. If you plot F vs d, then the work is the area under the curve at the two points. ...
f (x) - mrdsample
... on the object (slope of U(x) = 0) it must either possess only potential energy and be at rest or, it also possesses kinetic energy and must be moving at a constant velocity. x4 is a position of unstable equilibrium. If the object is displaced ever so slightly from this position, the internal forces ...
... on the object (slope of U(x) = 0) it must either possess only potential energy and be at rest or, it also possesses kinetic energy and must be moving at a constant velocity. x4 is a position of unstable equilibrium. If the object is displaced ever so slightly from this position, the internal forces ...
Work
... – Force is the net force on the object (system) – No internal changes to object (system) e. g. Lifting a rock produces no kinetic energy because there is no net force on the rock (on average). e.g. Compressing a spring produces no kinetic energy because there are internal changes to the system ...
... – Force is the net force on the object (system) – No internal changes to object (system) e. g. Lifting a rock produces no kinetic energy because there is no net force on the rock (on average). e.g. Compressing a spring produces no kinetic energy because there are internal changes to the system ...
Chapter 1 Introduction and Definition of Terms
... If body A and B are each in thermal equilibrium with a third body C, they are also in thermal equilibrium with each other. TA = TC and TB = TC => TA = TB The aim of classical thermodynamics is to establish the relationships which exist between equilibrium state of a given system and the influences w ...
... If body A and B are each in thermal equilibrium with a third body C, they are also in thermal equilibrium with each other. TA = TC and TB = TC => TA = TB The aim of classical thermodynamics is to establish the relationships which exist between equilibrium state of a given system and the influences w ...
PHYSICS 211, Exam # 3 April 22, 2013 (Dr. Xinhua Bai`s session
... B) mechanical energy was increased by nonconservative forces C) mechanical energy was decreased by nonconservative forces D) mechanical energy was increased by conservative forces E) mechanical energy was decreased by conservative forces 3. A 0.50-kg block attached to an ideal spring with a spring c ...
... B) mechanical energy was increased by nonconservative forces C) mechanical energy was decreased by nonconservative forces D) mechanical energy was increased by conservative forces E) mechanical energy was decreased by conservative forces 3. A 0.50-kg block attached to an ideal spring with a spring c ...
2017WorkEnergyandPowerworksheet
... PCB 2H Practice Problems Name________________ Work, Energy, and Power: 1. A force of 800 Newtons is needed to push a car across a lot. Two students push the car 40 meters. How much work is done? 32000 J or 32 kJ 2. How much work is done in lifting a 60 kg crate a vertical distance of 10 meters? What ...
... PCB 2H Practice Problems Name________________ Work, Energy, and Power: 1. A force of 800 Newtons is needed to push a car across a lot. Two students push the car 40 meters. How much work is done? 32000 J or 32 kJ 2. How much work is done in lifting a 60 kg crate a vertical distance of 10 meters? What ...
The Work Energy Theorem
... a force F, through a displacement d • W=Fdcos – W = [J], F = [N], d = [m] James Prescott Joule (1818 – 1889): - English physicist - Discovered relationship btw. heat & mechanical work (energy) - Conservation of Energy Theorem ...
... a force F, through a displacement d • W=Fdcos – W = [J], F = [N], d = [m] James Prescott Joule (1818 – 1889): - English physicist - Discovered relationship btw. heat & mechanical work (energy) - Conservation of Energy Theorem ...
Work
... dW Power is the rate at which work is done: P dt Average power (work done per time interval t): ...
... dW Power is the rate at which work is done: P dt Average power (work done per time interval t): ...
Energy & Power
... grabs a vine to get over a chasm, but the other side is 1.8 m higher. How fast does he need to be running to make it? vi = ? ...
... grabs a vine to get over a chasm, but the other side is 1.8 m higher. How fast does he need to be running to make it? vi = ? ...
P4 revision
... Work done = Force applied x Distance moved Question: If a force of 1500N is applied to a wall however the wall cannot be moved, what is the work done? Work done is measured in joules (J) ...
... Work done = Force applied x Distance moved Question: If a force of 1500N is applied to a wall however the wall cannot be moved, what is the work done? Work done is measured in joules (J) ...
Chapter_9_Vocabulary
... Motion – a change in position over time Frame of reference – a group of objects from which you can measure a position or the motion Speed – how fast an object’s position changes over time Velocity – the measurement that combines both the speed and the direction of a moving object Acceleration – the ...
... Motion – a change in position over time Frame of reference – a group of objects from which you can measure a position or the motion Speed – how fast an object’s position changes over time Velocity – the measurement that combines both the speed and the direction of a moving object Acceleration – the ...
Unit 7 Review
... 6. A diver with a mass of 80.0 kg dives off the 10.0 m platform. His velocity just before striking the water is 14.0 m/s. What is his kinetic energy at that moment? ...
... 6. A diver with a mass of 80.0 kg dives off the 10.0 m platform. His velocity just before striking the water is 14.0 m/s. What is his kinetic energy at that moment? ...
4.1 The Concepts of Force and Mass
... Two ways to look at the problem 1) A net upward force (F - mg) does work and moves the mass upward and changes its kinetic energy: ...
... Two ways to look at the problem 1) A net upward force (F - mg) does work and moves the mass upward and changes its kinetic energy: ...
Conservation of Energy Worksheet
... Part III – Conservation of Energy 8. State the law of conservation of energy. 9. A 200-kg boulder is 1000-m above the ground. a) What is its potential energy when it is 1000-m above the ground? b) What is its kinetic energy when it is 1000-m above the ground? c) The boulder begins to fall. What is i ...
... Part III – Conservation of Energy 8. State the law of conservation of energy. 9. A 200-kg boulder is 1000-m above the ground. a) What is its potential energy when it is 1000-m above the ground? b) What is its kinetic energy when it is 1000-m above the ground? c) The boulder begins to fall. What is i ...
Energy
... ● All objects have inertia. ● Inertia: the tendency of an object to remain unchanged until that state is changed by an external ...
... ● All objects have inertia. ● Inertia: the tendency of an object to remain unchanged until that state is changed by an external ...