M1 MS Jan 2006

Page 1

January 2006

6677 Mechanics M1 Mark Scheme

Question Number

1.

Scheme

Distance after 4 s = 16 x 4 – ½ x 9.8 x 42

(a)

= – 14.4

Marks

M1 A1

 h = (+) 14.4 m

A1 (3)

v = 16 – 9.8 x 4

(b)

M1 A1

= –23.2  speed = (+) 23.2 m s–1

A1 (3) 6

2.

(a)

CLM:

3 x 4 + 2 x 1.5 = 5 x v  v = 3 m s–1

M1 A1 A1 (3)

(b) (i)

CLM:

3 x 4 – m x 4 = –3 x 2 + m (x 1)

M1 A1

 m = 3.6

A1 (3)

(ii)

I = 3.6(4 + 1) [or 3(4 + 2)]

M1 A1

= 18 Ns

(2) 8

1


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M1 MS Jan 2006 by The de Ferrers Academy - Issuu