If a net force is greater than 0 Newtons, what is the force?
1 answer:
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Answer:
(A) Original velocity will be 7.244 m /sec
(B) Acceleration will be
Explanation:
We have given distance covers by truck s = 40 m
Time taken by truck to cover this distance t = 7.45 sec
Final velocity v = 3.50 sec
According to second equation of motion
-----eqn 1
According to first equation of motion
v = u + at
So -----eqn2
Solving equation 1 and 2
a =
And u = 7.244 m /sec
(A) Original velocity will be 7.244 m /sec
(B) Acceleration will be
Five
The diagram that represents rays from the sun is given below.
The answer from the diagram is parallel lines.
Six
The formula for this is n_i * Sin(i) = n_r * sin(r)
n1 = 1.333 water
n2 = 1.309 ice
i (angle) = 40o
r (angle) = ?
Solution
1.333 * sin(40) = 1.309*sin(r)
1.333 * sin(40)/1.309 = sin(r)
0.6546 = sin(r)
sin-1(0.6546) = 40.88 degrees.
I guess my closest answer would be A. I'm not rounding at all and that's the answer I get.
