Answer:
Answered
Explanation:
A) The work done by gravity is zero because displacement and the gravitational force are perpendicular to each other.
W= FS cosθ
θ= 90 ⇒cos90 = 0 ⇒W= 0
B) work done by tension
W= Tcosθ×S= 5cos30×2.30= 10J
C) Work done by friction force
W= f×s=1×2.30= 2.30 J
D) Work done by normal force is Zero because the displacement and the normal force are perpendicular to each other.
E) The net work done= Work done by tension in the rope - frictional work
=10-2.30= 7.7 J
Answer:
-4.72005 m/s
0 m/s
Explanation:
Displacement = 5220 km
Time = 12.8 days
The average velocity is given by
The average for the return flight is -4.72005 m/s
When the total displacement is divided by the total time of a journey then we get the average velocity.
Displacement is the minimum distance between the initial and final points of the journey.
Here, the displacement of the whole episode is 0 as the initial and final point is zero.
Hence, the average velocity for the whole episode is 0 m/s
Astronomers who discovered quasars found that they show of their spectral lines and are thus probably much "Radio Waves" <span>than nearby galaxies.
Hope this helps!</span>
Answer: d = 400 m
Explanation:
Distance during acceleration
d = ½at² = ½(2.0)10² = 100 m
velocity after 10 s
v = 2.0(10) = 20 m/s
distance at constant speed
d = vt = 20(10) = 200 m
As the acceleration is the same magnitude while slowing down as speeding up, It will take the same distance to complete the deceleration 100 m
Total distance is 100 + 200 + 100 = 400 m
Yes.
The acceleration vector WILL point south when the car is slowing down while traveling north
