19:00
1 of 4
Question 1 · 4 marks
Calculator allowed
A 2 kg particle moves at 10 m
s
−
1
^{-1}
−
1
along a horizontal line. A resistance
(
2
x
+
4
)
(2x+4)
(
2
x
+
4
)
N opposes motion after displacement
x
x
x
m.
(a)
Find the work done against resistance over the first 3 m.
2 marks
J