Edexcel IGCSE Physics - Forces and Motion (HT, Single Award)

Which of the following is a vector quantity?

What does a levelling-off curve indicate on a distance-time graph?

TRUE OR FALSE: A flat line on a velocity-time graph indicates an object is stationary.

[blank_start]Weight[blank_end] is a force, measured in [blank_start]Newtons[blank_end], caused by the force of [blank_start]gravity[blank_end] pulling an object towards the Earth’s [blank_start]centre[blank_end]. [blank_start]Mass[blank_end], measured in kilograms, is the [blank_start]quantity[blank_end] of [blank_start]matter[blank_end] an object contains, and will [blank_start]remain[blank_end] constant. A 1kg masss will weigh [blank_start]1.6N[blank_end] on the moon, and ≈[blank_start]10N[blank_end] on Earth.

You can find the [blank_start]speed[blank_end] of an object on a distance-time graph by its [blank_start]gradient[blank_end].

TRUE OR FALSE: Objects need a constant overall force to keep them moving.

According to Newton's [blank_start]Second[blank_end] Law, a [blank_start]resultant force[blank_end] means an object will [blank_start]accelerate[blank_end] in the direction of the [blank_start]resultant force[blank_end].

Resultant force is equal to [blank_start]mass[blank_end] [blank_start]multiplied[blank_end] by [blank_start]acceleration[blank_end].

What is Newton's Third Law?

When an object begins to fall, it accelerates at ≈10m/s^2. As [blank_start]velocity[blank_end] increases, [blank_start]air resistance[blank_end] builds up. Resistance gradually [blank_start]reduces[blank_end] acceleration until [blank_start]air resistance[blank_end] is [blank_start]equal to[blank_end] acceleration. At this point, the object travels at a constant speed. The object reaches [blank_start]terminal velocity[blank_end].

TRUE OR FALSE: If you stretch a material past its elastic limit, the material will return to it's original length.

Select the following factors that increase braking distance.

[blank_start]Stopping Distance[blank_end] is the sum of [blank_start]Thinking Distance[blank_end] and [blank_start]Braking Distance[blank_end]. [blank_start]Thinking Distance[blank_end] is the distance the car travels between the [blank_start]driver[blank_end] noticing the [blank_start]hazard[blank_end] and applying the [blank_start]brakes[blank_end], whilst [blank_start]Stopping Distance[blank_end] is the distance the car travels whilst the brakes are being [blank_start]applied[blank_end].

Momentum is the product of [blank_start]mass[blank_end] and [blank_start]velocity[blank_end].

Select the correct equation for moments.

The unit for moments is Newton metres ([blank_start]Nm[blank_end]).