P2a Quiz

In a distance time graph, the gradient gives us:
1. the acceleration
2. the speed
3. the distance
4. nothing
The gradient of the speed-time graph tells us:
1. the acceleration
2. the speed
3. the distance
4. nothing
The area under the speed-time graph tells us:
1. the acceleration
2. the speed
3. the distance
4. nothing
The area under the distance time graph tells us:
1. the acceleration
2. the speed
3. the distance
4. nothing
A lorry takes 90 minutes to travel 60 km. Its avaerage speed is:
1. 0.67 km/h
2. 40 km/h
3. 90 km/h
4. 5400 km/h
The tachograph on lorry produces a:
1. distance time graph
2. acceleration time graph
3. a speed time graph
4. read out of the engine speed.
Velocity means:
1. speed with a direction.
2. very high speed
3. speed with attitude (a term used for excessive speed brought on by road rage).
4. a posh word for speed (as used in St Neots).
Which one of these statements gives the correct definitions for a vector and a scalar?
1. A vector is a scalar with attitude.
2. A vector has a value and a direction, while a scalar only has a value.
3. A vector has a direction only, while a scalar only has a value.
4. A scalar is the path taken by a goldfish in a garden pond.
Acceleration is a vector that can be
1. positive only
2. negative only
3. positive or negative
4. both positive and negative at the same time.
Acceleration has a direction that is
1. the direction of the balanced force
2. at 90 degrees to the balanced force.
3. in the opposite direction to the unbalanced force
4. the direction of the unbalanced force.
In circular motion:
1. the velocity is constant but the speed is always changing
2. the speed is constant but the velocity is changing.
3. both the speed and the velocity are constant.
4. both the speed and the velocity are changing.
In circular motion, there is acceleration because:
1. the velocity is changing all the time as the direction is changing all the time.
2. the velocity is getting bigger all the time.
3. the velocity is getting smaller all the time.
4. the speed is changing all the time.
Two forces, of magnitude (value) 6 N and 8 N act at 90 degrees to each other. The magnitude of the resultant force is:
1. 10 N
2. 14 N
3. 48 N
4. 100 N
Forces are balanced when:
1. there is an even number of forces
2. there is an odd number of forces.
3. all the forces add up to zero.
4. there are no forces at all.
An aeroplane is flying in such a way that all the forces acting on it are balanced. This means that:
1. it is not flying at all; it is stationary on the ground.
2. it will remain at a constant speed but will descend.
3. it will remain at a constant speed and will climb.
4. it will fly at a constant speed, an remain at the same height.
Forces act in pairs - this is
1. Newton's First Law
2. Newton's Second Law
3. Newton's Third law
4. Newton's Law of Conservation of Forces.
Newton's First Law says that:
1. an object that is at rest or travelling at constant velocity will remain in that state until a force acts upon that object.
2. for a constant mass, the acceleration is directly proportional to the force.
3. forces act pairs
4. forces are neither created nor destroyed; they are turned from one force to another.
Acceleration and force are linked by the equation:
1. F = m/a
2. F = ma
3. F = a/m
4. m = FA
The units for acceleration are:
1. metres per second.
2. seconds per metre
3. metres per second squared.
4. seconds per square metre
Weight is:
1. a force, measured in kilograms
2. a force, measured in newtons.
3. a mass, measured in kilograms
4. a mass, measured in newtons
On the Earth, the gravitational field strength is:
1. the same as the acceleration due to gravity.
2. less than the acceleration due to gravity.
3. more than the acceleration due to gravity.
4. entirely independent of the acceleration due to gravity
The total stopping distance for a car is:
1. the thinking distance x the time
2. the thinking distance - the braking distance
3. the thinking distance + the braking distance
4. the thinking speed x time
If you double the speed of a car, the braking distance goes up by:
1. twice
2. three times
3. four times
4. six times
Which one of these does NOT increase the reaction time?
1. Hold a conversation on a mobile telephone
2. Taking recreational drugs
3. Being drunk
4. Having bald tyres.
It is a serious motoring offence to have bald tyres, because:
1. it looks vulgar.
2. it increases the grip on dry roads.
3. it increases the risk of a skid on a wet road.
4. the law was demanded by tyre manufacturers to boost sales.
Terminal velocity means:
1. the maximum speed that a skydiver will reach when falling through the air.
2. it's very terminal if you hit the ground at that speed.
3. your lungs will burst at terminal speed, which will be terminal for you.
4. the speed at which there is a greater than 50 % chance that you will be seriously injured or killed if you hit the ground at that speed.
A parachutist reduces his terminal velocity to about 3 m/s when he opens his parachute. This is because
1. he has reduced the total surface area, increasing the drag.
2. he has increased the total surface area, increasing the drag
3. he has reduced the total surface area, increasing the drag
4. he has reduced the total surface area, reducing the drag
Which two factors are most important in determining the terminal speed of an object through a fluid?
1. The mass of the fluid used and its temperature.
2. The volume and mass of the fluid
3. The colour and refractive index of the fluid.
4. The density and viscosity of the fluid.
In an experiment to test the strength of a large block of special concrete, an aeroplane was slammed into the block at 800 km/h. The aeroplane was vapourised. This is because:
1. the aeroplane had become hot due to friction
2. the concrete, not the aeroplane was vapourised due to heat from the aeroplane.
3. the kinetic energy from the aeroplane wasrapidly turned to heat to vapourise the aeroplane.
4. the rocket under the aeroplane was hot enough to vapourise the plane.
The Law of Conservation of Energy states that:
1. energy cannot be created, but it can be destroyed.
2. energy can be created, but cannot be destroyed.
3. energy can neither be created nor destroyed.
4. energy can be created and destroyed, but must be in equal amounts.
The formula for gravitational potential energy is:
1. mass x gravitational field strength x height difference.
2. mass x (weigh)^2
3. 1/2 x mass x (speed)^2
4. volts x amps
There are two possible units for momentum. They are:
1. kg m/s or N/s
2. kg m/s or N s
3. kg m s or N/s
4. kg m s or N s
The formula for momentum is:
1. p = mv
2. p = m/v
3. p = v/m
4. p = F/A
In an accident, the force can be reduced by:
1. reducing the time for the change in momentum
2. keping the momentum constant
3. destroying the momentum.
4. increasing the time for the change of momentum
An object becomes positively charged when:
1. electrons are added
2. protons are added
3. electrons are removed
4. protons are removed.
A balloon is given a negative charge by rubbing it on a jumper. It is placed on a wall and sticks to the wall. This is because:
1. electrons on the balloon attracts protons towards it.
2. electrons on the balloon repel the electrons in the wall, leaving the protons where they are
3. electrons on the balloon repel the protons, leaving the electrons in the wall where they are.
4. the distribution of charge makes tiny little fibres on the surface of the balloon stand on end. These attach to microscope holes in the wall, anchoring the balloon firmly to the wall.
The breakdown voltage of air is about 3000 V/mm. A spark 5 cm long jumps from the top dome of a Van der Graaff generator. The correct value for the voltage causing this spark is:
1. 600 V
2. 15000 V
3. 150 000 V
4. 600 000 V
If you touch a Van der Graaff generator,
1. you will be killed instantly because of the high voltage.
2. you will be killed instantly because of the high current.
3. you will get a small shock because of the low voltage.
4. you will get a small shock because the current is tiny, even though the voltage is high.
The solar wind travels towards the Earth at 400 000 m/s. They interact with the Earth's magnetic field to cause:
1. auroras (northern or southern lights)
2. massive thunderstorms.
3. acid rain
4. global warming.
Which one of these is NOT a use for static electricity?
1. A photocopier
2. An electrostatic dust precipitator
3. A paint sprayer
4. The need to connect a bonding line when refuelling an aeroplane.