1. How would you expect an instantaneous acceleration vs. time graph to look for a cart moving with a constant
1 answer:
Answer:
a=0 v = v₀ + a t
a=0 line is horizontal
Explanation:
1, In a graph of acceleration vs. time, we have lines, when the line is horizontal it is zero, when the line has a positive slope the increasing accelerations and when the slope is negative the decreasing acceleration
2, speed and relationship of a car is given by
v = v₀ + a t
where vo is the initial velocity, a is the acceleration and tel time
in this case I will calcograph velocity vs. time the constant acceleration is a straight line.
In general from the graph we can find the initial velocity with the cut at that x and the acceleration of the car with the slope
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Answer:
(a) Magnitude of seat force at lowest point = 678 + 92 = 770
(b) Force exerted by the seat (highest point) = 310 N
(c) Force exerted by seat (lowest point) = 1046 N
Explanation:
At the highest point the magnitude of force by the seat = 586 N
The weight of the student = 678 N
Thus, at the highest point, the difference in this force is due to the centrifugal force acting on the boy. This can be calculated as follows:
Centrifugal Force = 678 - 586 = 92 N
(a) The magnitude of force on the student by the seat at the lowest point will have to appose both the student's weight and centrifugal force acting towards the ground. This would mean:
Magnitude of seat force at lowest point = 678 + 92 = 770 N
(b) If the wheel's speed is doubled, the centrifugal force will change accordingly. The equation of centrifugal force is given below:
We can see from this that the force is directly proportional to the square of the velocity. So if the velocity is doubled, the centrifugal force increases four times.
So at the highest point the centrifugal force will decrease the force of weight acting on the seat. The seat force would then be:
Force exerted by the seat = Weight - Centrifugal force
Force exerted by the seat = 678 - (4 * 92)
Force exerted by the seat (highest point) = 310 N
(c) The force exerted by the seat at the lowest point will be the centrifugal force plus the weight.
This is:
Force exerted by seat = Centrifugal force + Weight
Force exerted by seat = (4 * 92) + 678
Force exerted by seat (lowest point) = 1046 N