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