Time
An airboat with mass 3.50 * 10²kg. including
passengers, has an engine that produces a net
hortmontalforce of 7.70 *10²N, after accounting
for forces of resistance. (a) Find the acoeleration of
the airboat. (b) Starting from rest, how long does
it take the airboat to reach a speed of 120 m/s?
Id After reaching this speed, the pilot turns off the
engine and drifts to a stop over a distance of
50.0 m. Find the resistance force, assuming it's
constant
.
Answers
Answer:
Answer :-
The present age of father and son is
Explanation :-
Given :
Present age of father = Six times the present age of his son.
After 4 years, the age of father will be four times the age of son.
To find :
Present age of father and son
Solution :
Let the present age of son be x
and the present age of father be 6x
After four years,
Age of son = (x + 4) years
Age of father = (6x + 4) years
According to question,
= > 6x + 4 = 4(x + 4)=>6x+4=4(x+4)
= > 6x + 4 = 4x + 16=>6x+4=4x+16
= > 6x - 4x = 16 - 4=>6x−4x=16−4
= > 2x = 12=>2x=12
= > x = \dfrac{12}{2}=>x=
2
12
= > x = 6=>x=6
Hence, the value of x is 6.
Now,
The age of son (x)= 6 years
The age of father (6x) => (6 × 6) = 36 years
Step-by-step explanation:
force F = 770 N (a) Acceleration a = F / m = 770/ 350 = 2.2m/ s2 (b) Initial speed u = 0.0 m/s final speed v = 12.0 m/s acceleration a = 2.2 m/ s2 Using the Newton's law of motion, we get v=u+a∗t or, 12 = 0 + 2.2 * t or, t = 12 / 2.2 = 5.45 s (c) u= 12.0 m/s, v = 0.0 m/s,distance d = 50.0 m Using v2=u2−2∗a∗d or, 122=02−2∗a∗50 or, a = 144 / 100 = 1.44 m/...