Why is thesize saved prior to entering the for loop? 2. what is the running time of removefirsthalf if lst is an arraylist? 3. w
1 answer:
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Answer:
1.1 sec
Explanation:
m = mass of the box = 8 kg
k = spring constant of the spring = 69 N/m
v = initial speed of the box = 1.5 m/s
t = time period of oscillation of box in contact with the spring
Time period is given as
Inserting the values
t = 1.1 sec
Explanation:
(a) It is given that two-third of weight is over the drive wheels. So, mathematically, w = .
Hence, maximum force is expressed as follows.
Hence, the maximum acceleration is calculated as follows.
=
= 6.53
Hence, the maximum acceleration of the Porsche on a concrete surface where μs = 1 is 6.53 .
(b) Since, 30% of the power is lost in the drive train. So, the new power is 70% of .
That is, new power =
Now, the expression for power in terms of force and velocity is as follows.
P =
Therefore, speed of the Porsche at maximum power output is as follows.
=
= 11.568 m/s
= 11.57 m/s
Therefore, speed of the Porsche at maximum power output is 11.57 m/s.
(c) The time taken will be calculated as follows.
time =
=
= 1.77 s
Therefore, the Porsche takes 1.77 sec until it reaches the maximum power output.