0.1J
1.0J
10.0J
100.0J
Correct answer is A
Energy = \(\frac{1}{2} ke^2 = \frac{1}{2} \times 20 \times 0.1^2\)
= 0.1J
23N
17N
7N
5N
Correct answer is B
W = \(\sqrt{15^2 + 8^2}\) = 17N
The resultant of the parallel force is zero
the algebraic sum of the moment of the forces is zero
all the parallel forces must be equal in magnitude and in direction
the sum of the forces in one direction must be equal to the sum of forces in the opposite direction
Correct answer is A
No explanation has been provided for this answer.
25.00s
10.00s
2.50s
2.24s
Correct answer is D
t = \(\sqrt{\frac{2s}{g}} = \sqrt{\frac{2 \times 25}{10}} = 2.24\)
1.25ms-2
1.60ms-2
4.00ms-2
8.00ms-2
Correct answer is B
s = \(ut + \frac{1}{2}at^2\)
80 = 0 x 10 + \(\frac{1}{2}\) x a x 102
a = \(\frac{80}{50} = 1.6ms^2\)
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