P2.1 - Everything in the Specification

Label the distance-time graph with the correct descriptions of movement.

Label the velocity-time graph with the correct descriptions of movement.

How is speed calculated from a distance-time graph? By using the [blank_start]gradient[blank_end]. How is acceleration calculated from a velocity-time graph? By using the [blank_start]gradient[blank_end]. How is velocity calculated from a velocity-time graph? By [blank_start]reading[blank_end] the value off of the [blank_start]y-axis[blank_end]. How is distance calculated from a velocity-time graph? By using the [blank_start]area[blank_end] under the [blank_start]graph[blank_end].

Speed is a scalar, velocity is a vector.

[blank_start]RESULTANT[blank_end] [blank_start]FORCE[blank_end] - The overall [blank_start]force[blank_end] acting on an [blank_start]object[blank_end].

If the [blank_start]resultant force[blank_end] acting on a [blank_start]stationary[blank_end] object is: - [blank_start]zero[blank_end], the object will remain [blank_start]stationary[blank_end] - non-zero, the object will [blank_start]accelerate[blank_end] in the [blank_start]direction[blank_end] of the [blank_start]resultant force[blank_end] If the resultant force acting on a moving object is: - [blank_start]zero[blank_end], the object will continue to move at a [blank_start]constant[blank_end] [blank_start]velocity[blank_end] - [blank_start]non-zero[blank_end], the object will [blank_start]accelerate[blank_end] in the [blank_start]direction[blank_end] of the [blank_start]resultant force[blank_end]

What happens (in terms of forces) when two objects interact?

What are the four factors that affect thinking distance?

What are the four factors that affect braking distance?

[blank_start]STOPPING[blank_end] DISTANCE - The [blank_start]distance[blank_end] covered in the [blank_start]time[blank_end] between the driver first spotting a [blank_start]hazard[blank_end] and the vehicle coming to a complete [blank_start]stop[blank_end]. It is the [blank_start]sum[blank_end] of the [blank_start]thinking[blank_end] distance and the braking distance.

[blank_start]THINKING[blank_end] DISTANCE - The [blank_start]distance[blank_end] the vehicle travels during the driver's [blank_start]reaction[blank_end] time.

[blank_start]BRAKING[blank_end] DISTANCE - The [blank_start]distance[blank_end] the car travels under the [blank_start]braking[blank_end] force.

Complete the passage about the role of brakes in a car. When the [blank_start]brakes[blank_end] of a vehicle are applied to slow the car down, work is done by the [blank_start]frictional[blank_end] force between the [blank_start]brakes[blank_end] and the [blank_start]wheel[blank_end]. This force reduces the [blank_start]kinetic[blank_end] energy of the vehicle, as energy is [blank_start]transferred[blank_end] into [blank_start]heat[blank_end] (and sound) energy. Therefore, the [blank_start]temperature[blank_end] of the brakes [blank_start]increase[blank_end].

When a vehicle travels at a constant speed, the resistive forces are balanced with the car's weight.

The [blank_start]faster[blank_end] an object moves through a [blank_start]fluid[blank_end], the [blank_start]greater[blank_end] the [blank_start]frictional[blank_end] force that acts on it.

Which of the following statements is false? 1. 'Drag' is another name for air resistance. 2. Friction always opposes movement, even in space. 3. To travel at a steady speed, the driving force and frictional force must be balanced. 4. Friction occurs between two surfaces in contact. 5. Speed is directly proportional to friction.

Fill in the blanks to complete the table showing the movement of an object falling through a fluid.

What are the two factors that impact the terminal velocity of a falling object?

Select the correct answers to explain the movement, in terms of forces, of the parachutist at each stage.

[blank_start]ELASTIC[blank_end] [blank_start]OBJECT[blank_end] - An object that can return to its [blank_start]original[blank_end] [blank_start]shape[blank_end] after having its [blank_start]shape[blank_end] changed by a [blank_start]force[blank_end].

When you apply a [blank_start]force[blank_end] to an object, you may cause it to change its [blank_start]shape[blank_end]. A [blank_start]force[blank_end] applied to an [blank_start]elastic[blank_end] object in order to change its [blank_start]shape[blank_end] is stored by the object as [blank_start]elastic[blank_end] potential energy. The [blank_start]elastic[blank_end] potential energy is then converted to [blank_start]kinetic[blank_end] energy when the [blank_start]force[blank_end] is removed, and the object returns to its original [blank_start]shape[blank_end].

The extension of an elastic object is inversely proportional to the force applied to it.

[blank_start]LIMIT[blank_end] OF [blank_start]PROPORTIONALITY[blank_end] - The [blank_start]maximum[blank_end] force that an [blank_start]elastic[blank_end] object can take and still extend [blank_start]proportionally[blank_end].

When a car is [blank_start]aerodynamic[blank_end], it means that it is shaped so that [blank_start]air[blank_end] flows very easily and smoothly past it, so [blank_start]air[blank_end] [blank_start]resistance[blank_end] is minimised.