Answer:
Explanation:
Velocity vs speed and distance vs displacement is a pretty important. Distance and speed have no direction while displacement and velocity have a direction.
In other words, taking the first example, going 5m one way and then 14 the other would make the total distance 19m, while displacement would be -9m from where you started.
Anyway, velocity is displacement divided by time. For the first one I already got that the displacement is -9m, and the time is 11 minutes. It's worth noting that the answers are all in m/s, so we should convert the minutes to seconds. To do that multiply 11 minutes by (60 seconds/1 minute) so the minutes cancel out. so 11*60 is 660 seconds. Now, to find velocity we just divide. -9m/660s = -.0136 Which... doesn't seem to be one of the options...
For the second part it gives two point of views. If you were standing on the carrier, the spy would look like it was moving 4 m/s away from you, but the carrier itself is moving 12 m/s in the positive direction to an onlooker. If it's hard to figure out try thinking what it would look like if the spy was just standing still. it would look like they were moving -12 m/s if you were standing on the carrier. Then if the spy was moving at say 1 m/s it would look like they were moving -11 m/s if you were standing on the carrier.
Just keep that line of reasoning , where if it looks like the spy is moving -4 m/s from the carrier then the spy is moving 4 m/s slower than the carrier, so the spy is moving at 8 m/s
Pretty sure I got the first part right, so maybe a misprint from the question?
Answer:
Limiting the use of fossil fuels such as oil, carbon and natural gas and replacing them with renewable and cleaner sources of energy, all while increasing energy efficiency
Explanation:
Answer: 5.075Ns
Explanation:
Given the following :
Mass of ball = 145g
Initial Speed of ball = 15m/s
Final speed of ball when hit by the batter = - 20m/s ( Opposite direction)
The impulse of a body is represented using the relation:
Force(f) * time(t) = mass (m) * (final Velocity(V) - initial velocity(u))
Therefore, using:
m(v - u) = impulse
Mass of ball = 145 / 1000 = 0.145kg
Impulse = 0.145(- 20 - 15)
Impulse = 0.145(-35)
Impulse = 5.075Ns
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Description
In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector quantity. Impulse applied to an object produces an equivalent vector change in its linear momentum, also in the resultant direction.
I think it would be d because development in nations needs more population
is the acceleration of gravity