Answer:
7.2375m/s^2
Explanation:
initial velocity=-25 km/h=-6.94m/s
final velocity=35 km/h=9.72m.s
distance=3.2m
v^2=u^2+2as
9.72^2=-6.94^2+2a*3.2
94.48=48.16+6.4a
(94.48-48.16)/6.4=a
7.2375m/s^2
B.) Distance = time x speed = 40x5 = 200miles.
Answer:
0.304 m/s2
Explanation:
If the first child is pushing with a force of 69N to the right and the 2nd child is pushing with a force of 91N to the left. Then the net pushing force is 91 - 69 = 22 N to the left. Subtracted by 15N friction force then the system of interest is subjected to F = 7 N net force tot he left.
We can use Newton's 2nd law to calculate the net acceleration of the system
Unlike acceleration and velocity, speed does not need to specify the direction of motion. Speed is a scalar quality.
Answer:
D. All of the above
Explanation:
Global warming may cause all of the given choices.
Global warming is the rise in surface temperature. This is due to the trapping of heat within the earth surface.
It is as a result of huge amount of greenhouse gases within our atmosphere. They typically permit short wave radiations to escape and they do not allow short wave radiation to pass through. This in turn produces heat.
- The heat can melt polar ices and glaciers.
- This in turn will cause sea levels to rise.
- Also, the ocean temperature will generally increase due to this.