Resultant forces - Study guides, Study notes & Summaries

Kinetic Energy and Jump Height Correct Answer-The relationship between flight height yflight and takeoff velocity vtake-off can be obtained by applying the law of conservation of mechanical energy to the flight phase of the jump. The mechanical energy (E) of the jumper is the sum of the kinetic energy (KE = ½mv2) and gravitational potential energy (PE = mgy). In vertical jumping the effect of air resistance is negligible, and so in the flight phase the jumper can be considered as a projectile i...

FE Electrical Exam Complete Solutions With Latest Questions And Answers 2024 A+. Define Enthalpy Correct Answer: total energy of a system Which of the following is true of the electric field intensity about an isolated point charge? A. It varies directly as the distance to the charge. B. It varies inversely as the distance to the charge. C. It varies directly as the square of the distance to the charge. D. It varies inversely as the square of the distance to the charge. Correct Answer: D. ...

Conceptual Physics Practice Exam Questions with Correct Answers (t/f) If a hockey puck slides at a constant speed on a perfectly frictionless surface, it is demonstrating Newton's 1st Law - Answer-True (t/f) If you are holding an apple at rest in your palm, the apple's weight and the normal force supporting the apple form an action-reaction pair - Answer-False (t/f) An object in equilibrium must be at rest - Answer-False (t/f) For an object suspended by two separate ropes that is i...

Anaphylactic shock is characterized by: a. labored breathing and hypertension. b. wheezing and widespread vasodilation. c. intracellular hypovolemia and hives. d. a deficiency of circulating histamines. correct answer: b. wheezing and widespread vasodilation Distributive shock occurs when: a. central vasoconstriction forces blood from the core of the body. b. blood pools in expanded vascular beds and tissue perfusion decreases. c. microorganisms attack the blood vessels, resulti...

Parallelogram law (step 1) correct answer: Add the vectors into a diamond shape so they add up to 360 degrees Parallelogram law (step 2) correct answer: Use the law of cosines (or law of sines) to find the Resulting vector Parallelogram law (step 3) correct answer: Calculate theta using law of sines to refind the angle of a vector then subtracting it from the 2nd vectors angle Triangle law (step 1) correct answer: Add the vectors into a triangle shape so they add up to 180 degrees ...

AQA AS Physics - Mechanics and Materials Exam Questions and Answers 100% Pass Scalar A unit with magnitude but no direction. Vector A unit with magnitude and direction. What are the two methods for adding vectors? Scale drawings and trigonometry. Free-body force diagrams Show all the forces acting on a body, each arrow shows the size and the direction of the force. Equilibrium The forces acting on a body are balances and it is not accelerating (it may be at rest or at a...

GRADE 12: MECHANICS Compiled by T. Doyle Acknowledgements: C. Fairman; S. Murray and IEB SAGs , 2 Background… Mechanics is the branch of physics dealing with the behaviour of bodies (objects) when forces are exerted on them. Kinematics is the branch of mechanics dealing with changes in motion without reference to the forces causing the changes. Dynamics is the branch of mechanics dealing with the relationships between the changes in motion of bodies and the for...

Define Enthalpy Correct Answer: total energy of a system Which of the following is true of the electric field intensity about an isolated point charge? A. It varies directly as the distance to the charge. B. It varies inversely as the distance to the charge. C. It varies directly as the square of the distance to the charge. D. It varies inversely as the square of the distance to the charge. Correct Answer: D. It varies inversely as the square of the distance to the charge. As a profession...

AQA Physics paper 2 Exam With Complete Solutions 2024 force - answer- this can change something's speed, direction, or shape - it can be push/repulsive or pull/attractive vector - answera quantity with magnitude (size) AND direction scalar - answera quantity with magnitude (size) but NOT direction examples of vectors - answerforce, weight, velocity, acceleration, displacement examples of scalars - answerdistance, mass, speed, energy, time contact forces - answeroccur when an object is s...

AQA Physics paper 2 Exam With Complete Solutions 2024 force - answer- this can change something's speed, direction, or shape - it can be push/repulsive or pull/attractive vector - answera quantity with magnitude (size) AND direction scalar - answera quantity with magnitude (size) but NOT direction examples of vectors - answerforce, weight, velocity, acceleration, displacement examples of scalars - answerdistance, mass, speed, energy, time contact forces - answeroccur when an object is s...