A because light is the fastest thing on this earth
Answer:
a) 627.84 Joules
b) 117.72 Joules
c) 1255.68 Joules
Explanation:
<em>(See figure 1)</em>
The gravitational potential energy relative to the child’s lowest position is:
(1)
with h the vertical distance of the swing from the lowest position, m the mass of the child and g the acceleration of gravity.
a) When the ropes are horizontal, the swing is at 1.60 m from the lowest position, so by (1):
b) When the ropes make a 36.0◦ angle with the vertical, the swing is at a distance d from the lowest position, we should use trigonometric relations to find that distance. By figure 2 we have a right triangle with adjacent side and hypotenuse 1.60, so using the trigonometric relation we can solve for d:
Using d on (1):
c) Note that at the bottom of the circular arc the distance of the swing relative to the lowest position is two times the length of the rope, so h=3.20 m, using this on (1):
Answer:
slower speeds = larger and faster steering wheel movements
faster speeds = small and slow steering wheel movements
Explanation:
When driving at slower speeds you need to use larger and faster steering wheel movements. This is because at slow speeds the car does not have enough momentum to make certain maneuvers with small steering wheel movements in a given amount of time, therefore making large and faster steering wheel movements gives the car enough time with the momentum it has to make the desired maneuver. At faster speeds only small and slow steering wheel movements are needed and while cause the car to quickly change to the desired direction due to the increased momentum of the car.