Erstellt von Isleworth Physics
vor mehr als 6 Jahre
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Frage | Antworten |
What is the difference between a scalar and a vector? | |
List examples of scalars | |
List examples of vectors | |
How can you draw a vector? | |
What is the difference between a contact force and a non-contact force? | |
List examples of contact forces | |
List examples of non-contact forces | |
What is weight? | |
How are weight and mass different? | |
What is the mathematical relationship between weight and mass? | |
What is the formula that links mass and weight? | |
What instrument can be used to measure weight? | |
What is meant by ‘centre of mass’ | |
What does resultant force mean? | |
A 2N force and a 5N force are acting on an object in the same direction (to the right). What is the resultant force? | |
A 2N force acts left and a 5N force acts right on an object. What is the resultant force? | |
What does a free-body force diagram show? | |
If two forces are acting on an object in different directions, how could you use a scale diagram to find the magnitude and direction of the resultant force? | |
What are the two components that you can split a resultant force into? | |
What is work done? | |
What is another term for work done? | |
What formula is used to calculate work done? | |
What is the definition of 1 joule (hint – it comes from the formula for work done) | |
What are the alternative units for the joule? | |
What way do frictional forces always act on moving objects? | |
What happens to the temperature of an object when work is done against friction forces? | |
Why is more than one force needed to change the shape of an object? | |
What is the difference between elastic deformation and inelastic deformation? | |
What is the relationship between the extension of an spring and the force applied? | |
What is the formula that links force and extension of a spring? | |
If an object is compressed, rather than stretched, what does e stand for? | |
What type of energy is stored when something is stretched or compressed? | |
If a spring is elastically deformed, what is the relationship between the work done on the spring and the elastic potential energy stored? | |
What is the difference between a directly proportional relationship, a linear relationship and a non-linear relationship? | |
Sketch a graph to show how force and extension are lined (including beyond the limit of proportionality) | |
What is the limit of proportionality? | |
How could you find the spring constant from a force-extension graph? | |
What formula is used to calculate the work done in stretching (or compressing) a spring? | |
How are distance and displacement different? | |
What are typical values for the speed of walking, running and cycling? | |
Why is the speed of an object not usually constant? | |
What is the typical value for the speed of sound in air? | |
What is the formula used to calculate the speed on an object? | |
What does uniform motion mean? | |
What is velocity? | |
If something is moving in a circle, explain why it can have a constant speed, but the velocity changes? | |
In a distance-time graph, how would you identify: A stationary object An object travelling with a constant speed An object reversing at a constant speed An object accelerating An object decelerating | |
How could you find the speed of an object in a distance-time graph? | |
How could you find the speed of an object in a distance-time graph if it is a curve? | |
In a velocity-time graph, how would you identify: A stationary object An object travelling with a constant speed An object accelerating at a constant rate An object decelerating at a constant rate | |
How can you find acceleration or deceleration from a velocity time graph? | |
How can you find the distance traveled in a velocity-time graph? | |
How can you find the area under a velocity-time graph if it was a curve? | |
What would non-uniform acceleration or deceleration look like in a velocity-time graph? | |
What are the units for acceleration? | |
What is the formula that links acceleration, change in velocity and time? | |
What is the formula that links initial velocity, final velocity, acceleration and distance? | |
What is the acceleration for an object falling due to gravity? | |
What is the deceleration of an object being thrown up in the air? | |
What two forces are acting on a ball falling through a fluid? | |
Why does an object falling through a fluid accelerate at the start, and then travel at a constant speed? | |
What is Newton’s first law? | |
How does Newton’s first law explain a car moving at a constant speed? | |
What is inertia | |
What is Newton’s second law in words? | |
What is the equation for Newton’s second law? | |
What could a resultant force on a moving object cause to happen? | |
What is inertial mass | |
What does this symbol ⁓ mean? | |
What is Newton’s third law? | |
What is important about the Newton’s third law pairs? | |
What is stopping distance? | |
How does speed affect stopping distance for a given braking force? | |
What are typical values for reaction time? | |
What factors affect a driver’s reaction time? | |
State some ways of measuring reaction time | |
What factors affect braking distance? | |
When a force is applied to the brakes of a car, work is done. Why? | |
What is the relationship between the speed of a car and the braking force needed to stop it? | |
What are the dangers of large decelerations? | |
Estimate the forces involved in deceleration a car on a normal road | |
What is momentum? | |
What are the units for momentum? | |
What is the law of conservation of momentum? | |
Explain what is happening, in terms of momentum, when two cars collide. One is stationary before the collision (car A). The cars stick together | |
Explain what is happening, in terms of momentum if someone steps off a stationary boat | |
Investigate the relationship between force and extension for a spring | |
Investigate the effect of varying the force on the acceleration of an object of constant mass | |
Symbols, names and units for equations |
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