w
w
e
tr
.X
w
Core 1
ap
eP
m
1
om
.c
s
er
Fig. 1
Mechanics 2
Page 1
Core 2
2
Fig. 2
2
Mechanics 2
Page 2
Core 3
3
Fig. 3
Mechanics 2
Page 3
Core 3
Fig. 4
Mechanics 2
Page 4
Alternative to Practical 1
5
Fig. 5
5
Mechanics 2
Page 5
Alternative to Practical 1
5
6.
Fig. 6
Mechanics 2
Page 6
Alternative to Practical 1
7
Fig. 7
7
Mechanics 2
Page 7
Extension 1
8
Fig. 8
8
8
Mechanics 2
Page 8
Extension 2
9
Fig. 9
9
Mechanics 2
Page 9
Extension 2
10
Fig. 10
10
Mechanics 2
Page 10
Core 1
a
Yes
b
increase the diameter of the handle
change it to B / C
Mechanics 2
Yes
No
page 1
Core 2
a(i)
B
(ii)
greater weight or force or heavier hammer head
b(i)
B
(ii)
as (ii) above
c
weight of hammer
time to lift
d(i)
kinetic energy or energy of motion
(ii)
heat
sound
Mechanics 2
page 2
Core 3
a(i)
D
(ii)
largest area creates least pressure
b
increases
decreases
length AB
√
width BC
√
thickness CD
√
area touching the
horizontal
surface
mass of sheet
√
√
weight of sheet
√
density of metal
√
pressure on horizontal
surface
√
Mechanics 2
stays the same
page 3
Alternative to Practical 1
a
any suitable vertical such as set-square or plumb-line
b
the straw is no longer horizontal
B moves downwards
c
25.7 cm
d
a table with two columns identified and with units
e(i)
na = 9.44 or 9.5
nw = 4.4 or 4.5
(ii)
upwards
smaller than the weight
Mechanics 2
page 4
Extension 1
a
pressure = height x density x g
= 6 x 1000 x 10
= 60 000 Pa
b
force
= pressure x area
= 45 000 x 0.015
= 680 N
c
work done = force x distance
= 550 x 4
= 2200 J
d
places
at the pulley axles
in the persons body
at the block
energy is transferred against friction
and in moving parts of the body
Mechanics 2
page 5
Extension 2
a
downward force through the centre of the mass and upward force along the wire
downward force = 5 N
b
upward force or tension = 5 N
downward
weight or gravity or pull of the earth
upward
tension or pull of wire
c(i)
initially a straight line then a curve of decreasing gradient to Z
(ii)
1.5 kg
(iii)
12 mm
Mechanics 2
page 6