Answer:
1) A
2) C
3) B
4) A
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6) Incomplete information(picture missing)
7) Incomplete information(picture missing)
8) A
9) C
10) C
Explanation:
1) m = 15kg, a =  , F = ma = 15*10 = 150N
, F = ma = 15*10 = 150N
2) m = 3kg, v =  , r = 4m, F =
, r = 4m, F = 
 = 12N
 = 12N
3) a =  , r = 10m, v=?
, r = 10m, v=?
F =  and F = ma
 and F = ma
equating the two equations and cancelling a, we have:
 = a
 = a
making v the subject of formula, we have:
v = 
= 
= 10
4) r = 10m, v =  , a = ?
, a = ?
F = 
F = ma
equating the above equations and making a subject of formula, we get:
a = 
a = 25/10 = 2.5
5) I can't find the picture associated with this question
6) I can't find the picture associated with this question
7) I can't find the picture associated with this question
8) F = 
assuming m and r is unity, that is the values are 1 respectively, the formula simplifies to:
F = 
Now, if v is tripled
F = 
F = 9
We can see that the force will be 9X greater than it was.
9) F = 
assuming m and r is unity, that is the values are 1 respectively, the formula simplifies to:
F = 
Now, if v is doubled
F = 
F = 4
We can see that the force will be 4X greater than it was.
10) F = 
assuming m and v is unity, that is the values are 1 respectively
F = 1/r
if r is doubled, 
F = 1/2 * 1/r
We can see that the force is 1/2 as big as it was