Study guides, Class notes & Summaries

A force is needed to - change an objects state of motion The combination of all forces acting on an object is called the - net force When you hold a rock at rest in your hand, you are pushing upward on it with as much force as Earth's gravity pulls down on it. The net force would be - zero on the rock The scientific unit of force is the newton-- - abbreviated N Tension is a - stretching force Weight is the force of gravity - acting downward on an object A vector is an arrow that - repre...

When you push against a wall with your fingers, they bend because they experience a force. Identify this force? - Opposite force A boxer can't hit a heavy bag with great force. Why can't he hit a piece of tissue paper in midair with the same amount of force? - Doesn't have resistance How many forces are required for an interaction? - Two One end of the rope is pulled with 100 N, while the opposite end is pulled with 100N. The tension in the rope is what? - 100 N A piece of rope is p...

What causes a moving object to keep on course? - Inertia What force exists between objects even in the absence of direct physical contact? - Field Force In the free-body diagram shown above showing a motorcycle, what can you say is happening? - The person is slowing down In the free-body diagram show above, the F N force represents... - The support force of ground on According to Newton's second law, when the same force is applied to two objects of different masses, the lighter mass wil...

1. When does conservation of energy apply? - Always 2. The conservation of energy - ____________ is a fundamental concept of physics along with the conservation of mass and the conservation of momentum. Within some problem domain, the amount of energy remains constant and energy is neither created nor destroyed. 3. A rock is perched at the very edge of the top of a very high cliff ready to fall any minute. What kind of energy does it have? - Potential Energy 4. If the rock isn't moving...

Friction - The force that always opposes motion Coefficient of friction - Force of friction divided by normal force Net force - Resultant force, the sum of all forces acting on an object Free body diagrams - Physical model of a representation of forces acting on a system 2-dimensional motion - Any motion of an object is more than one line, a plane Vector independence - Changes in one vector do not cause changes in another Projectile - Any object launched into the air with no force other th...

B - A cart rolls down inclined track and is accelerating. It fires a ball straight out of the cannon as it moves. What happens to the ball? A.) It falls in front of the cart B.) It falls right back into the cart C.) It falls behind the cart C - You drop a package from a plane flying at constant speed in a straight line. Without air resistance, what will the package do? A.) Remain vertically behind the plane B.) Remain vertically in front on the plane C.) Remain vertically under plane...

What are the steps of the scientific method? - 1. Make an observation/ask a question 2. Form a hypothesis 3. Design and perform an experiment 4. Analyze Data 5. Form conclusion What are Newton's 3 laws of motion? - 1. Law of inertia 2. F=ma 3. For every action there is an equal and opposite reaction What is the net force on a cart pulled with 70 lbs of force to the left and 20 lbs of force to the right? - 50 lbs to the left What does it mean to say something is in mechanical equili...

Unit for force A) second (s) B) meter (m) C) Newton (N) D) Joule (J) - C) Newton (N) The study of motion in One Dimension A) Kinematics B) Kinesthetics C) Oncology D) Osmology - A) Kinematics Vectors include both A) speed and direction B) magnitude and direction C) distance and acceleration D) magnitude and distance - B) Magnitude and direction Unit for mass A) second (s) B) meter (m) C) kilogram (kg) D) gram (g) - C) kilogram (kg) Unit for acceleration A) m/s^2 B) m/s C)...

AS PHYSICS Paper 1 Wednesday 17 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If ...

2 © OCR 2023 Water in a reservoir Pipe Turbine National grid Generator 1 The diagram shows a hydroelectric power station. (a) What is the useful energy store of the water in the reservoir? Tick () one box. Chemical Electrical Gravitational Potential Thermal [1] (b) Many of the main energy resources use a turbine attached to a generator. Complete the table to state what drives the turbine for each energy resource. Tick () one box in each row. What drives the turbine Water Win...