1. 1. 2. 3. Y11 INTERVENTION : Resultant force, braking, Mains
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme

2. 1. The force needed to accelerate the boat will be greater than 102 N
because you have to overcome drag forces
An equal and opposite force from the water pushes on the boat
in the forward direction 1.
5 mins
Acceln = change in velocity =
time taken
= 12
Acceln = 1.5 m/s/s
F = ma =
68 x 1.5 = 102 N

3. 1. 2. 3. Y11 INTERVENTION : Resultant force, braking, Mains
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme

4. 2. Distance car travels during the drivers reaction time
Work done = Fs = 320,000
8000 N x s = 320,000
40 m
Tiredness, alcohol,
drugs, speed, age 2.
10 mins
s = 320,000 =
8,000
Icy roads, worn tyres, road surface,
mass of car, efficiency of brakes
KE = 1 x mass x ( velocity )2 2
Work done by friction
KE = 1 x 1600 x ( 20 ) = 320,000 J 2
decreases the Kinetic energy
and increases the thermal energy
Work done = Fs =
KE = 320,000J

5. 1. 2. 3. Y11 INTERVENTION : Resultant force, braking, Mains
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme

6. 3. 5 mins The max current is 26 A with all 4 hobs on full power.
This exceeds the safe current for
a thin cable of 2.5mm2.
The cable will overheat.
Current in one element = 26 / 4 = 6.5 A
The cable has LIVE, NEUTRAL, EARTH
The cable will have 6mm2 cross sec area
V = I R
V = R I
230 = R
6.5
35 ohms
The cable will be insulated
V = R I
AC is constantly changing direction
DC flows is one direction

7. 1. 2. 3. Y11 INTERVENTION : Resultant force, braking, Mains
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme