# Revsionstuff

give to me to help in revsion. hope you find it you full

- Created by: George G Heal
- Created on: 23-03-14 13:59

## Other slides in this set

### Slide 2

Here's a taster:

P2 REVISION CHAPTER 2 FORCES

What is the definition of a force? Using the formula F=ma, fill in the table

a b c d e

Force (Newtons, N) 200 840 5000

What are balanced forces and when do they occur?

Mass (kilograms, kg) 20 7.0 0.40

Acceleration

0.80 5.0 6.0 0.20

(meters/second squared, m/s2)

What are unbalanced forces and when do they occur?

What is stopping distance, and what are the two parts that make up a car's stopping

distance?

Calculate the resultant force:

What factors affect stopping distance?

What do we do to prevent speeding in this country?

ASSESSMENT:

What is terminal velocity? What is Hooke's law?…read more

### Slide 3

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P2 REVISION CHAPTER 3 WORK, ENERGY & MOMENTUM

What is work done?

What is momentum?

What is the equation for work done?

Complete the question below using this equation

momentum (kg m/s) = mass (kg) X velocity (m/s)

How does friction affect work done? If a sprinter with a mass of 50kg runs at a velocity of

10m/s what is their momentum?

A 0.5 kg trolley is pushed at a velocity of 1.2 m/s into a

stationary trolley with a mass of 1.5 kg. The two trolleys

stick to each other after the impact.

Calculate:

The momentum of the 0.5 kg trolley before the collision

The velocity of the two trolleys straight after the impact

What is conservation of momentum and how do you calculate it?

KEY WORDS: ASSESSMENT:

Transfer

What features do we add to cars to make them safe? Work done

Gravitational potential energy

Elastic potential energy

Momentum

Conservation of momentum…read more

### Slide 4

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P2 REVISION CHAPTER 4 CURRENT ELECTRICITY

Label these circuit components: What is static electricity?

What happens when you rub a polythene rod with a dry cloth?

What happens when you rub a perspex rod with a dry cloth?

You can use diagrams to help.

Link the component to the What is resistance?

correct graph

What is the equation for resistance?

What is the rule for resistance in a series

circuit?

ASSESSMENT:

What is the rule for resistance in a

parallel circuit?…read more

### Slide 5

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P2 REVISION CHAPTER 5 MAINS ELECTRICITY

What is the difference between direct current and alternating What is a fuse and how does it work?

current?

Why do we use alternating current for mains electricity? What is a circuit breaker and how does it work?

How do we measure alternating current?

Electrical energy and charge

Work through these questions:

Calculate the charge flow when

the current is 8A for 80s.

In a standard 3-pin plug what is: Q=IXt

X:

Y:

Z Calculate the energy transferred in

Z: a component when the charge

passing through it is 30C and the

How do the materials and design of the following plug parts improve potential difference is 20V

Energy transferred = volts X coulombs

their safety?

Case

Fuse

Pins

ASSESSMENT:

How are electrical cables designed to be safe?…read more

### Slide 6

Here's a taster:

P2 REVISION CHAPTER 6 RADIOACTIVITY

What is radiation? Give 3 uses of radioactivity, and a How did each of these scientists contribute to our

brief description of how they work: understanding of radiation?

Henri Becquerel:

What causes background radiation?

Marie Curie:

Ernest Rutherford:

Properties of radiation:

Explain what half-life is:

Fill in this table assuming there is a 10% decay every hour:

Time from start (hours) 0 1 2 3 4 5 6

ASSESSMENT:

No. of unstable atoms 1000 900 477

No, of unstable atoms that

100 90 48

decay in the next hour…read more

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